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Evidence record

Why is there anything at all?

Every sentence on the exploration belongs to at least one claim below. Each says what kind of statement it is, what it rests on, what the evidence does not establish, and how far it was checked. Nothing here is a score, and none of it is a verdict on a belief or a theory.

Last checked 24 September 2026.

  • A judgement, not a fact: 18
  • Source checked: 32
  • Presented as open: 2
  • Partly checked: 2

If something here is wrong, misquoted, out of date or unfair, write to support@unknownoceans.com and give the claim number, which does not change.

What the question takes for granted

A question in metaphysics with a physics question beside it. Physics describes the early universe and can report what it measured; whether there could be an explanation of there being anything at all, and what kind, is argued among philosophers, and the page reports that argument rather than settling it.

  • There might have been nothing

    Contested

    The question contrasts what there is with an empty alternative. Some philosophers argue that a world with no concrete thing in it is not a genuine possibility; others, following the subtraction argument, that it is.

  • Whatever exists contingently calls for an explanation

    Contested

    This is the principle of sufficient reason. Its defenders hold it self-evident or needed for science; its critics hold that brute facts are acceptable.

  • The question is well formed

    Contested

    Some philosophers hold it asks for an explanation nothing could give, or asks of everything what can only be asked of its parts.

How the question is labelled

Claim: Something rather than nothing

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Why anything?

Kind
Framing. Signposting. It asserts nothing a source could check.

The question

Claim: The question everything else is standing on.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s own framing. Heidegger, as the reference work reports, called the question the most fundamental issue of philosophy.

  • Context

    Nothingnessopening

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Let’s begin with a question that Martin Heidegger famously characterized as the most fundamental issue of philosophy.

Claim 3 · checked 24 September 2026 · AI-assisted audit

Claim: Physics can describe the early universe in remarkable detail

Kind
What the field holds. The settled view of a field, as a review, a consensus statement or a reference work gives it. Not one study.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Big-Bang Cosmologysection 22.1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Astronomical observation · Review of the field

    The source reads: Indeed, it was the observation of this radiation that singled out the Big-Bang model as the prime candidate to describe our Universe. Subsequent work on Big-Bang nucleosynthesis (BBN) further confirmed the necessity of our hot and dense past.
  • Supports

    Planck 2018 results. VI. Cosmological parametersabstract

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Astronomical observation · Measurement

    The source reads: We find good consistency with the standard spatially-flat 6-parameter ΛCDM cosmology

What this does not establish

The detail is in the hot expansion after its first moments; see claims 15 to 17 for where it thins out.

Later work looked for

The PDG review revised in August 2025 (read) is later than Planck 2018 and holds the same standard model of the hot early universe; nothing that changes it.

Claim 4 · checked 24 September 2026 · AI-assisted audit

Claim: and has nothing to say about why there is a universe to describe.

Kind
Disputed. A contested point, where the page reports a side or the disagreement.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.
  • Context

    Nothingnesssection 10

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Philosophers complain of misleading advertising. They asked one question and the proud physicists answered a different question.
  • Cuts against

    Nothingnesssection 10

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Frank Wilczek (1980), Stephen Hawking and Leonard Mlodinow (2010, 180) as well as Lawrence Krauss (2012) explicitly claim that this answers the question of why there is something rather than nothing.

Other readings

Wilczek, Hawking and Mlodinow, and Krauss hold that physics does answer it; the page reports their accounts and the reply to them in claims 20 to 22.

Claim 5 · checked 24 September 2026 · AI-assisted audit

Claim: It is not clear that any possible evidence would settle it.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from the entry’s point that no observation could favour the empty alternative, and from claim 46.

  • Context

    Nothingnesssection 1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: No experiment could support the hypothesis ‘There is nothing’ because any observation obviously implies the existence of an observer.

Claim 6 · checked 24 September 2026 · AI-assisted audit

Claim: Every other question on this site assumes a world to ask it about.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

A statement about the site’s other questions, each of which is about something in the world.

Claim 7 · checked 24 September 2026 · AI-assisted audit

Claim: This one does not, which is why it sits at the deepest level on the site.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page is filed at the deepest of the site’s five levels, where it is one of two questions.

Corrected

24 September 2026. Previously: “This one does not, which is why it sits at a different depth from the rest.” Another question on the site is filed at the same depth, so this one does not sit at a depth of its own.

Claim 8 · checked 24 September 2026 · AI-assisted audit

Claim: It may not be a scientific question.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Hedged as a possibility. The reference work notes that scientists also accept equilibrium explanations, so the question is not simply closed to science.

  • Context

    Nothingnesssection 1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Scientists stereotypically offer causal explanations. These are not feasible given the comprehensive reading of ‘Why is there something rather than nothing?’.

Claim 9 · checked 24 September 2026 · AI-assisted audit

Claim: It may not be a well-formed question.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Hedged as a possibility; the arguments for it are in claims 67 to 70.

  • Context

    Nothingnesssection 3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Consequently, the question of why there is something rather than nothing is incomplete.
  • Context

    Nothingnesssection 5

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Brenner argues the question is highly ambiguous.

Claim 10 · checked 24 September 2026 · AI-assisted audit

Claim: It has also refused to go away for two and a half thousand years.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnessopening

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: But around the fifth century BCE in China, India, and Greece, philosophers turned from what is, to what is not (Sorensen 2022). Ever since, there has been commentary on omissions, holes, vacuums, and the possibility of an empty world.
  • Supports

    Cosmological Argumentopening; section 1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: On the one hand, the argument arises from human curiosity as to why there is something rather than nothing

What this does not establish

The reference work dates the turn to what is not, and to the possibility of an empty world, to the fifth century BCE; it does not say the question was asked in these words then.

Claim 11 · checked 24 September 2026 · AI-assisted audit

How far physics runs the question back

Claim: How far physics runs the question back

Kind
Framing. Signposting. It asserts nothing a source could check.

We can describe the early universe, not its origin

Claim: We can describe the early universe, not its origin

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Heads a passage whose claims 14 to 17 say where the description reaches and where it thins out.

  • Context

    Big-Bang Cosmologysection 22.1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: If correct, these ideas would strictly render the term ‘Big Bang’ redundant, since it was first coined by Hoyle to represent a criticism of the lack of understanding of the initial conditions.

Claim 13 · checked 24 September 2026 · AI-assisted audit

Claim: Measurements of the cosmic microwave background and of light-element abundances constrain conditions in the first minutes with real precision.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Planck 2018 results. VI. Cosmological parametersabstract

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Astronomical observation · Measurement

    The source reads: baryon density Ωbh2 = 0.0224± 0.0001 ... Standard big-bang nucleosynthesis predictions for the helium and deuterium abundances for the base-ΛCDM cosmology are in excellent agreement with observations.
  • Supports

    Big-Bang Cosmologysection 22.3.7

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Astronomical observation · Review of the field

    The source reads: The abundances of the light elements depend almost solely on one key parameter, the baryon-to-photon ratio
  • Qualifies

    Big-Bang Cosmologysection 22.3.7

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: The BBN predicted Li abundance is systematically higher than the Li abundance observed in the atmospheres of halo dwarf stars

What this does not establish

Deuterium agrees closely and helium reasonably; lithium is predicted higher than it is seen in old stars, which the review thinks may be depletion in the stars themselves.

Later work looked for

The PDG review revised in 2025 (read) is later than Planck 2018: deuterium in excellent agreement, lithium still discrepant; recorded in limits, nothing on the page changes.

Claim 14 · checked 24 September 2026 · AI-assisted audit

Claim: Known particle physics carries the description back to a small fraction of a second.

Kind
What the field holds. The settled view of a field, as a review, a consensus statement or a reference work gives it. Not one study.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Big-Bang Cosmologysection 22.3.2 and equation 22.44

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Theory · Review of the field

    The source reads: In the standard SU(3)×SU(2)×U(1) model, we can specify N(T ) up to temperatures of O(100)GeV. ... This can be expressed more conveniently in the form tT 2MeV = 2.4[N(T )]−1/2, (22.44) where t is measured in seconds and TMeV in units of MeV.

What this does not establish

The review gives the limit as a temperature, about 100 GeV, not a time; its relation between age and temperature puts that temperature far inside the first second.

Later work looked for

The PDG review is the 2025 revision; nothing later that changes it.

Corrected

24 September 2026. Previously: “The description runs backwards to a fraction of a second after the earliest state we can model, and then stops, not because of missing data but because the physics required does not exist in tested form.” The only cited source, Planck 2018, says nothing about where the description stops, and the sentence was garbled ("a fraction of a second after the earliest state we can model"). It also set data against theory when both run out. Rewritten to what the Particle Data Group’s cosmology review says, and that review added as a source.

Claim 15 · checked 24 September 2026 · AI-assisted audit

Claim: Earlier than that, what the universe contained depends on physics beyond the Standard Model, which has not been established,

Kind
What the field holds. The settled view of a field, as a review, a consensus statement or a reference work gives it. Not one study.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Big-Bang Cosmologysection 22.3.2

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Theory · Review of the field

    The source reads: At higher temperatures, N(T ) will be model dependent. For example, in the minimal SU(5) model, one needs to add 24 states

Later work looked for

The PDG review is the 2025 revision; nothing later that changes it.

Claim 16 · checked 24 September 2026 · AI-assisted audit

Claim: and inflation, the leading account of its initial conditions, is still a proposal.

Kind
What the field holds. The settled view of a field, as a review, a consensus statement or a reference work gives it. Not one study.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Big-Bang Cosmologysection 22.1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Theory · Review of the field

    The source reads: These relativistic cosmological models face severe problems with their initial conditions, to which the best modern solution is inflationary cosmology ... If correct, these ideas
  • Supports

    Fine-Tuningsection 2.3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Inflationary cosmology’s attractions notwithstanding, its suggested achievements are not universally recognized.
  • Qualifies

    Planck 2018 results. VI. Cosmological parametersabstract

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026

    The source reads: We find no evidence for deviations from a purely power-law primordial spectrum

What this does not establish

Inflation is well supported: the Planck data fit the simple primordial spectrum it predicts. "A proposal" means it is not yet established, not that it lacks evidence.

Later work looked for

The 2025 PDG review and the 2026 SEP revision (both read) still describe inflation conditionally; nothing that changes it.

Claim 17 · checked 24 September 2026 · AI-assisted audit

Even “nothing” is not simple

Claim: Even “nothing” is not simple

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Heads claims 19 to 22, on what physicists mean by an empty state.

Claim 18 · checked 24 September 2026 · AI-assisted audit

Claim: Empty space in quantum field theory is not empty: it is a particular state of the fields, and the fields carry energy from which particles can be created.

Kind
What a model says. What a theory or model predicts or describes, which is not the same as what has been observed.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 10

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Theory · Reference work

    The source reads: Particles are created with the help of energy present in “vacuums”. To say that vacuums have energy and energy is convertible into mass, is to deny that vacuums are empty. Many physicists revel in the discovery that vacuums are far from empty.
  • Supports

    Nothingnesssection 10, quoting David Albert (2012)

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Theory · Reference work

    The source reads: Relativistic-quantum-field-theoretical vacuum states–no less than giraffes or refrigerators or solar systems–are particular arrangements of elementary physical stuff.

What this does not establish

What the theory says about its vacuum, as a philosophy reference work reports it.

Corrected

24 September 2026. Previously: “Empty space in quantum field theory is not empty: it has structure, energy and measurable consequences.” "Structure" and "measurable consequences" are not in the cited source. Narrowed to what the entry says.

Claim 19 · checked 24 September 2026 · AI-assisted audit

Claim: Physicists’ accounts of the universe emerging “from nothing”, Lawrence Krauss’s among them, begin from that state.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 10

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Frank Wilczek (1980), Stephen Hawking and Leonard Mlodinow (2010, 180) as well as Lawrence Krauss (2012) explicitly claim that this answers the question of why there is something rather than nothing. ... Why is there NOW something (particles) rather than nothing (mere energy in a quantum field)?

Corrected

24 September 2026. Previously: “Several popular accounts of the universe emerging “from nothing” are really accounts of it emerging from a quantum vacuum, which is a particular physical state with particular laws, not nothing.” The page gave one side of a dispute the source reports as two, as its own conclusion. Now attributed: Krauss’s defence and Albert’s reply, both as the entry gives them.

Claim 20 · checked 24 September 2026 · AI-assisted audit

Claim: Krauss defends the change of subject: science often makes progress by changing what its words mean.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 10

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Lawrence Krauss defends the switch as an improvement. Often scientists make progress by altering the meaning of key terms.

Claim 21 · checked 24 September 2026 · AI-assisted audit

Claim: David Albert replies that a vacuum is a particular arrangement of physical stuff, not nothing.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 10, quoting Albert (2012)

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: However, he denies that Lawrence Krauss’s particular change of meaning constitutes an improvement ... vacuum states–no less than giraffes or refrigerators or solar systems–are particular arrangements of elementary physical stuff.

Claim 22 · checked 24 September 2026 · AI-assisted audit

There is more matter than antimatter, and that is unexplained

Claim: There is more matter than antimatter

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Antimattersection "The matter-antimatter asymmetry problem"

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Astronomical observation · Review of the field

    The source reads: In fact, the Universe appears to contain almost no antimatter whatsoever.

Later work looked for

Canetti et al. 2012 (read) and the CERN page as served in 2026 agree; nothing that changes it.

Claim 23 · checked 24 September 2026 · AI-assisted audit

Claim: and that is unexplained

Kind
Open question. Something the page says is not known.
Review
Presented as open. The page says this is unresolved, and the review found that it is.
  • Supports

    Matter and antimatter in the universesection V, Conclusions

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026

    The source reads: The origin of matter remains one of the great mysteries in physics.

Claim 24 · checked 24 September 2026 · AI-assisted audit

Claim: A closely related and far more tractable version of the question:

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The physicists’ answers in claim 20 start from the matter-antimatter question, which is a question about particles within physics rather than about why there is anything.

  • Context

    Nothingnesssection 10

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: The basic idea goes back to an issue raised by the symmetry of matter and anti-matter.

Claim 25 · checked 24 September 2026 · AI-assisted audit

Claim: the observable universe is made of matter, with very little antimatter,

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Antimattersection "The matter-antimatter asymmetry problem"

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Astronomical observation · Review of the field

    The source reads: In fact, the Universe appears to contain almost no antimatter whatsoever.
  • Supports

    Matter and antimatter in the universesection V, Conclusions

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Astronomical observation · Review of the field

    The source reads: Observationally we can be almost certain that the present day universe contains no significant amounts of (baryonic) antimatter

Later work looked for

Crossref, 2023 on, "baryogenesis review": new models, no change to the observation.

Claim 26 · checked 24 September 2026 · AI-assisted audit

Claim: but the known laws are almost symmetric between them.

Kind
What a model says. What a theory or model predicts or describes, which is not the same as what has been observed.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Antimattersection on Dirac and the positron

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Physical systems · Review of the field

    The source reads: Today we know that every type of matter particle has a corresponding antiparticle with matching properties, except for opposite electrical charge.
  • Supports

    Matter and antimatter in the universesection II

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Theory · Review of the field

    The source reads: P and CP are violated by the weak interaction and the quark Yukawa couplings ... The CP violation and deviation from equilibrium during electroweak symmetry breaking are both too small.

What this does not establish

"Almost" is the measured CP violation, which is real and far too small to produce the observed excess within the Standard Model.

Later work looked for

Crossref, 2023 on, "baryogenesis review": proposals for new sources of CP violation, none established; nothing that changes it.

Claim 27 · checked 24 September 2026 · AI-assisted audit

Claim: The asymmetry is measured;

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

Measured as the baryon-to-photon ratio, about six parts in ten billion, from light elements and the microwave background.

  • Supports

    Antimattersection "The matter-antimatter asymmetry problem"

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Astronomical observation · Review of the field

    The source reads: some unknown mechanism created a tiny excess of matter – approximately one extra particle per billion antiparticles.
  • Supports

    Big-Bang Cosmologysection 22.3.7

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Astronomical observation · Review of the field

    The source reads: Consistency between theory and observations, driven primarily by recent D/H measurements [66,67], leads to a range of [68]

Later work looked for

The 2025 PDG review (read) gives the Planck-based value 6.12 ± 0.04 × 10^-10; nothing that changes it.

Claim 28 · checked 24 September 2026 · AI-assisted audit

Claim: its cause is an active research problem.

Kind
Open question. Something the page says is not known.
Review
Presented as open. The page says this is unresolved, and the review found that it is.
  • Supports

    Antimattersection "The matter-antimatter asymmetry problem"

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: One of the greatest challenges in physics today is figuring out what happened to the antimatter and understanding the source of the observed asymmetry between matter and antimatter.
  • Supports

    Matter and antimatter in the universesection V, Conclusions

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026

    The source reads: This asymmetry cannot be explained within the Standard Model of particle physics and cosmology.

Claim 29 · checked 24 September 2026 · AI-assisted audit

Whether the question has an answer

Claim: Whether the question has an answer

Kind
Framing. Signposting. It asserts nothing a source could check.

Whether the question demands an answer

Claim: Whether the question demands an answer

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Principles of sufficient reason (the idea that everything must have an explanation) have been argued over for centuries.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Cosmological Argumentsection 1, on Leibniz and Hume

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Leibniz (1646–1716) appealed to a strengthened principle of sufficient reason, according to which “no fact can be real or existing and no statement true without a sufficient reason for its being so and not otherwise”
  • Supports

    Cosmological Argumentsection 5.4

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Critics of the cosmological argument contend that the Causal Principle or, where applicable, the broader Principle of Sufficient Reason (PSR) that underlies versions of the argument, is suspect. As Hume argued

What this does not establish

The parenthesis gives the strong version. Weaker versions ask only that every contingent truth have an explanation, or that it possibly have one.

Claim 32 · checked 24 September 2026 · AI-assisted audit

Claim: If the principle holds and the universe is contingent, it needs an explanation outside itself.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Cosmological Argumentsection 5, and 5.1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: It is important to stress that what needs explanation is the existence of what is contingent, not the existence of everything ... A contingent being cannot provide an explanation for its own existence.
  • Qualifies

    Cosmological Argumentsection 5.2, on Rundle

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: why cannot nontheists accept the existence of the universe as a brute fact, as a necessary being?

Other readings

Bede Rundle argues that matter and energy, being conserved, are necessary, so the universe need not be contingent at all.

Corrected

24 September 2026. Previously: “If the principle holds, the universe needs an explanation outside itself.” The reference work stresses that the principle asks for an explanation only of what is contingent, and whether the universe is contingent is itself argued (Russell, Rundle).

Claim 33 · checked 24 September 2026 · AI-assisted audit

Claim: If it does not, a brute fact is permitted.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Cosmological Argumentsection 5.4, on Mackie

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: We can simply work with brute facts; beginning with them, science would work just as well.

Claim 34 · checked 24 September 2026 · AI-assisted audit

Claim: Neither position has been established,

Kind
Disputed. A contested point, where the page reports a side or the disagreement.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The reference work sets out arguments and replies on both sides and does not declare either settled.

  • Context

    Cosmological Argumentsection 5.4

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: The problem with the claim of self-evidence is that it is a conversation ender, not a starter.

Other readings

Alexander Pruss holds the principle self-evident; Peter van Inwagen argues it must be rejected.

Claim 35 · checked 24 September 2026 · AI-assisted audit

Claim: and much of the debate turns on which of them is the default.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s reading of the exchange in claims 58 and 59: one side treats a brute fact as a last resort, the other as an acceptable starting point.

  • Context

    Cosmological Argumentsection 5.4, quoting Pruss (2006: 255)

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: “Claiming to be a brute fact should be a last resort. It would undercut the practice of science”

Claim 36 · checked 24 September 2026 · AI-assisted audit

Whether “nothing” is coherent

Claim: Whether “nothing” is coherent

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Some philosophers argue that an empty world, with no concrete thing in it at all, is not a genuine possibility, so there is no alternative to there being something.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 5

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: There also remains hope that Rowe’s dilemma can be bypassed by showing that the empty world is not a genuine possibility. Then the retort to ‘Why is there something rather than nothing?’ is ‘There is no alternative to there being something!’.
  • Supports

    Nothingnesssection 7, on E. J. Lowe

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Consequently, the empty world is impossible even if there are no necessary beings.

Corrected

24 September 2026. Previously: “Some philosophers argue that an absolute nothing (no space, no time, no laws, no possibilities) is not a state that could have obtained, and therefore requires no explanation for its absence.” The argument in the source is about an empty world, one without concrete things. The entry notes that empty worlds may differ in their laws, so "no laws, no possibilities" described a different and stronger notion than the one argued over.

Claim 38 · checked 24 September 2026 · AI-assisted audit

Claim: Others follow Thomas Baldwin’s subtraction argument: take away the objects of a finite world one at a time, and the last removal leaves nothing.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 7

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Thomas Baldwin (1996) reinforces the possibility of an empty world ... Imagine a world in which there are only finitely many objects. Suppose each object vanishes in sequence. Eventually you run down to three objects, two objects, one object and then Poof! There’s your empty world.

What this does not establish

The argument is disputed: it may need a particular theory of possible worlds, and infinitely divisible objects cannot be removed one at a time.

Corrected

24 September 2026. Previously: “Others regard this as sleight of hand.” Nobody in the source calls the argument sleight of hand. Replaced with the opposing argument the entry actually sets out, attributed to its author.

Claim 39 · checked 24 September 2026 · AI-assisted audit

Claim: The argument is live.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 5

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: So ‘Why is there something rather than nothing?’ is, so far, a live question.
  • Supports

    Nothingnesssection 7

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Nevertheless, the persuasiveness of the subtraction argument is not entirely hostage to background theories about the nature of possible worlds.

Claim 40 · checked 24 September 2026 · AI-assisted audit

Where every proposal stops

Claim: Where every proposal stops

Kind
Framing. Signposting. It asserts nothing a source could check.

Why there are laws

Claim: Why there are laws

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Suppose the universe emerged from a quantum process.

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: That process obeyed rules.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Within the supposition: a quantum process is one governed by quantum theory.

  • Context

    Nothingnesssection 10, quoting Albert

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: And the fact that particles can pop in and out of existence, over time, as those fields rearrange themselves

Claim 44 · checked 24 September 2026 · AI-assisted audit

Claim: Where the rules came from is the same question in different clothing.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s application of the explanatory trap in claim 46 to the laws themselves.

  • Context

    Nothingnesssection 3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: To explain why something exists, we standardly appeal to the existence of something else.

Claim 45 · checked 24 September 2026 · AI-assisted audit

Claim: Any answer that begins from something that exists has this shape, which is why some philosophers conclude the question cannot be answered.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: If the explanation cannot begin with some entity, then it is hard to see how any explanation is feasible. Some philosophers conclude ‘Why is there something rather than nothing?’ is unanswerable.

Other readings

Others try explanations that do not start from an entity: probabilistic arguments such as van Inwagen’s, or arguments that something exists necessarily.

Corrected

24 September 2026. Previously: “Where the rules came from is the same question in different clothing, and every proposed answer so far has this structure.” "Every proposed answer so far" overreached: the source reports proposals that do not begin from an existing thing, such as van Inwagen’s probabilistic argument. Narrowed to the class of answer the entry says falls into the trap, and to who concludes what from it.

Claim 46 · checked 24 September 2026 · AI-assisted audit

Whether the constants could have been different

Claim: Whether the constants could have been different

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Several physical constants appear to sit in narrow ranges compatible with complex structure.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Fine-Tuningsections 1.1.1 and 1.2

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: The strength of gravity, when measured against the strength of electromagnetism, seems fine-tuned for life ... universes with different laws, constants, and boundary conditions would typically give rise to much less structure and complexity
  • Qualifies

    Fine-Tuningsection 1.2

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Fred Adams (2019) cautions against claims that the universe is extremely fine-tuned for life. According to him, the range of parameters for which the universe would have been habitable is quite considerable.

Other readings

Fred Adams finds the habitable ranges wide rather than narrow; Victor Stenger disputes the calculations more broadly.

Later work looked for

The 2026 SEP revision (read) reports Adams 2019 as the main later dissent; the page’s "appear to" already hedges; nothing that changes it.

Claim 48 · checked 24 September 2026 · AI-assisted audit

Claim: Whether they could have taken other values, and whether that fact requires explanation, is disputed at a fundamental level,

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Fine-Tuningsection 2.1

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: according to the standard view of physical possibility, alternative physical laws and constants are physically impossible by the definition of physical possibility
  • Supports

    Fine-Tuningsection 2.2

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: It is indeed uncontroversial that being improbable does not by itself automatically amount to requiring a theoretical response.

Claim 49 · checked 24 September 2026 · AI-assisted audit

Claim: partly because we have no theory that predicts them and no other universes to compare against.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s reading of why the dispute is hard to settle, from the two gaps the reference work records.

  • Context

    Fine-Tuningsection 2.3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: string theory would not come close to uniquely determining the laws and constants in the manner envisaged by Einstein.
  • Context

    Fine-Tuningsection 4.4

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Unfortunately, concrete multiverse scenarios such as the landscape multiverse are extremely difficult to test

Claim 50 · checked 24 September 2026 · AI-assisted audit

Three positions

Claim: Three positions

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Below this point, there is no instrument.

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Only the question, and what it is reasonable to say about it.

Kind
Framing. Signposting. It asserts nothing a source could check.

It is a brute fact

Claim: It is a brute fact

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Existence may simply be the case, with no further explanation available.

Kind
Hypothesis. A proposed explanation, not an established one.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Cosmological Argumentsection 5.2

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Bertrand Russell denies that the universe needs an explanation (premise 2); it just is.

What this does not establish

Stated as a position philosophers hold, not as a finding.

Claim 55 · checked 24 September 2026 · AI-assisted audit

Claim: Bertrand Russell held that the universe is “just there, and that’s all”.

Kind
Quotes a source. The words of a named text, checked against the source.
Review
Partly checked. Only part of the source could be read. What was not read is listed.
  • Supports

    Cosmological Argumentsection 5.2, quoting Russell (1948 [1964]: 175)

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: The universe needs no explanation; it is “just there, and that’s all” (Russell 1948 [1964]: 175).

What this does not establish

Quoted as the reference work quotes it; Russell’s 1948 text was not read.

Corrected

24 September 2026. Previously: “This is not a failure of inquiry; it is a position,” Whether accepting a brute fact is a failure of inquiry is exactly what Pruss and Mackie dispute, so the page was taking a side without saying so. Replaced with who holds the position.

Claim 56 · checked 24 September 2026 · AI-assisted audit

Claim: The position is compatible with everything currently known.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

No observation bears on whether the universe has an explanation; see claim 6.

Claim 57 · checked 24 September 2026 · AI-assisted audit

Claim: Alexander Pruss answers that claiming a brute fact “should be a last resort”, because it would undercut the practice of science;

Kind
Quotes a source. The words of a named text, checked against the source.
Review
Partly checked. Only part of the source could be read. What was not read is listed.
  • Supports

    Cosmological Argumentsection 5.4, quoting Pruss (2006: 255)

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: “Claiming to be a brute fact should be a last resort. It would undercut the practice of science” (Pruss 2006: 255).

What this does not establish

Quoted as the reference work quotes it; Pruss’s book was not read.

Corrected

24 September 2026. Previously: “It is also unfalsifiable, which is its main weakness.” No source calls unfalsifiability the position’s main weakness, and its rivals are no more falsifiable. Replaced with the objection the reference work records and the reply to it.

Claim 58 · checked 24 September 2026 · AI-assisted audit

Claim: John Mackie, that science would work just as well starting from brute facts.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Cosmological Argumentsection 5.4

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: As John Mackie argues, we have no right to assume that the universe complies with our intellectual preferences for causal order. We can simply work with brute facts; beginning with them, science would work just as well.

Claim 59 · checked 24 September 2026 · AI-assisted audit

Our universe is one of many

Claim: Our universe is one of many

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: In most current models, inflation is eternal, producing causally separate bubble universes whose local physics could differ from one to the next;

Kind
What a model says. What a theory or model predicts or describes, which is not the same as what has been observed.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Big-Bang Cosmologysection 22.3.5

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Theory · Review of the field

    The source reads: In most current inflation models, reheated bubbles typically do not percolate, so inflation is ‘eternal’ ... These causally disconnected bubble Universes constitute a ‘multiverse’, where low-energy physics can potentially vary between different bubbles.
  • Supports

    Fine-Tuningsection 4.4

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Theory · Reference work

    The source reads: According to many advocates of inflationary cosmology, the process of inflation results in causally isolated space-time regions, so-called “island universes”.

What this does not establish

What the models say; inflation itself is not established (claim 17).

Corrected

24 September 2026. Previously: “Eternal inflation and some string-theory constructions imply an enormous number of regions with different local physics.” Neither theory alone implies regions with different physics: the sources describe eternal inflation producing regions and the string landscape supplying the different vacua, and the review says the physics "can potentially vary". The Particle Data Group review is added as a source.

Claim 61 · checked 24 September 2026 · AI-assisted audit

Claim: string theory, which appears to allow an enormous number of vacua, would supply the differences.

Kind
What a model says. What a theory or model predicts or describes, which is not the same as what has been observed.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Fine-Tuningsection 4.4

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Theory · Reference work

    The source reads: When combined with the idea of island universes as suggested by inflationary cosmology one obtains a cosmological picture in which there are infinitely many island universes where all the different string theory vacua
  • Supports

    Fine-Tuningsection 2.3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Theory · Reference work

    The source reads: But according to our present understanding of string theory, the theory has an enormous number of lowest energy states, or vacua

What this does not establish

String theory is itself untested; "appears" follows the reference work’s "present understanding".

Claim 62 · checked 24 September 2026 · AI-assisted audit

Claim: This would explain apparent fine-tuning through selection rather than design.

Kind
Hypothesis. A proposed explanation, not an established one.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Fine-Tuningsection 4

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: if there is a sufficiently diverse multiverse in which the conditions differ between universes, it is only to be expected that there is at least one where they are right for life.
  • Qualifies

    Fine-Tuningsection 4.3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Critics of the argument from fine-tuning for the multiverse accuse it of committing the inverse gambler’s fallacy.

What this does not establish

Whether a multiverse would explain our own universe’s conditions is itself disputed: critics charge the inference with the inverse gambler’s fallacy.

Claim 63 · checked 24 September 2026 · AI-assisted audit

Claim: It does not explain why the generating framework exists,

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The explanatory trap of claim 46, applied to a multiverse.

  • Context

    Nothingnesssection 3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: To explain why something exists, we standardly appeal to the existence of something else.

Claim 64 · checked 24 September 2026 · AI-assisted audit

Claim: and its testability is contested.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Fine-Tuningsection 4.4

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Typicality principles have the benefit of making multiverse theories at least in principle testable (Aguirre 2007; Barnes 2017). They are controversial, however
  • Supports

    Big-Bang Cosmologysection 22.3.5

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Review of the field

    The source reads: This has led to a controversial ‘anthropic’ approach to cosmology

Claim 65 · checked 24 September 2026 · AI-assisted audit

The question is malformed

Claim: The question is malformed

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: A causal answer to why there is something rather than nothing would begin by naming something that already exists.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: To explain why something exists, we standardly appeal to the existence of something else. ... This pattern of explanation is not possible for ‘Why is there something rather than nothing?’.

Corrected

24 September 2026. Previously: “Asking why there is something rather than nothing asks for a causal explanation, and a causal explanation begins by naming something that already exists.” The question does not only ask for a causal explanation: the source reports equilibrium and probabilistic explanations offered for it. Narrowed to causal answers.

Claim 67 · checked 24 September 2026 · AI-assisted audit

Claim: Read as widely as the question demands, there is nothing left to name.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: Someone who poses the question in a comprehensive way will not grant the existence of the Universal Designer as a starting point.

Claim 68 · checked 24 September 2026 · AI-assisted audit

Claim: One reading of that is not that the answer is hidden but that the question is malformed: it asks of everything what can only be asked of the things inside it,

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.
  • Supports

    Nothingnesssection 3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Reference work

    The source reads: This kind of comprehensive questioning has long been alleged to commit the fallacy of composition. Questions that can be asked of elements within a system need not be questions that can be asked of the system itself.

Other readings

Others hold the question is incomplete for a different reason, that "thing" gives no criterion for counting; and Brenner that it is several questions at once.

Corrected

24 September 2026. Previously: “One reading of that is not that the answer is hidden but that the question is incomplete, and quietly assumes a vantage point that does not exist.” In the source, "incomplete" belongs to a different argument, about counting things without a sort. The argument that fits this passage is the fallacy-of-composition objection, now stated.

Claim 69 · checked 24 September 2026 · AI-assisted audit

Claim: and quietly assumes a vantage point that does not exist.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s image for the objection in claim 69, close to the reference work’s own.

  • Context

    Nothingnesssection 3

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: But when the philosopher steps back to get the biggest picture, he loses his footing. According to Immanuel Kant, the fall is misgauged as deep inquiry.

Claim 70 · checked 24 September 2026 · AI-assisted audit

What was read

  • NothingnessStanford Encyclopedia of Philosophy · Stanford Encyclopedia of Philosophy, "Nothingness" by Roy Sorensen, substantive revision of 28 February 2022; read sections 1 to 7 and 10 in fullRead in full, 24 September 2026 · Copyright; quoted briefly
  • Cosmological ArgumentStanford Encyclopedia of Philosophy · Stanford Encyclopedia of Philosophy, "Cosmological Argument", substantive revision of 1 July 2026; read sections 1, 5 to 5.4 and 8.4Read in full, 24 September 2026 · Copyright; quoted briefly
  • Planck 2018 results. VI. Cosmological parametersPlanck Collaboration / arXiv · arXiv:1807.06209v4 (9 August 2021); read the abstractThe cited passage was read, 24 September 2026 · Copyright; quoted briefly
  • AntimatterCERN · CERN, "Antimatter", web page as served on the access dateRead in full, 24 September 2026 · Copyright; quoted briefly
  • Fine-TuningSimon Friederich, Stanford Encyclopedia of Philosophy · Stanford Encyclopedia of Philosophy, "Fine-Tuning" by Simon Friederich, substantive revision of 26 February 2026; read the opening and sections 1.1, 1.2, 2 to 2.3 and 4 to 4.4Read in full, 24 September 2026 · Copyright; quoted briefly
  • Big-Bang CosmologyK. A. Olive and J. A. Peacock, Review of Particle Physics, Particle Data Group · Review of Particle Physics, chapter 22, "Big-Bang Cosmology", revised August 2025 by K. A. Olive and J. A. Peacock (PDF dated 1 December 2025); read sections 22.1, 22.2.4, 22.3.1 to 22.3.5 and 22.3.7Read in full, 24 September 2026 · Copyright; quoted briefly
  • Matter and antimatter in the universeCanetti, Drewes and Shaposhnikov, New Journal of Physics · arXiv:1204.4186v2 (5 November 2012), the text of New J. Phys. 14, 095012; read the abstract, sections I and II and the conclusionsThe cited passage was read, 24 September 2026 · CC BY-NC-SA 3.0 (journal version); quoted briefly