Persona #107
Pierre-Simon Laplace
1749–1827 · French mathematician, astronomer, philosopher of probability
Laplace's demon — given the position and momentum of every particle, the future is fixed
"Mécanique Céleste" (5 volumes, 1799–1825) systematised Newtonian celestial mechanics; "Théorie analytique des probabilités" (1812) and "A Philosophical Essay on Probabilities" (1814) systematised probability theory and gave the canonical philosophical statement of classical determinism — the intellect that knew every particle's state could, in principle, calculate the entire future and past of the universe.
Key works
- Exposition du système du monde (1796)
- Traité de mécanique céleste (1799–1825)
- Théorie analytique des probabilités (1812)
- A Philosophical Essay on Probabilities (Essai philosophique sur les probabilités, 1814)
Declared Influences
Determinism 50%
Naturalism 30%
Realism 20%
Determinism
50%
Laplace's demon is the canonical philosophical statement of classical determinism.
"We may regard the present state of the universe as the effect of its past and the cause of its future. … An intellect which at a certain moment would know all forces that set nature in motion … nothing would be uncertain and the future just like the past would be present before its eyes." (A Philosophical Essay on Probabilities)
Naturalism
30%
Famous reply to Napoleon when asked about God's place in his system: "Sire, I had no need of that hypothesis."
"Je n'avais pas besoin de cette hypothèse-là." (Napoleon-Laplace exchange, c. 1802)
Realism
20%
Robust scientific realism about Newtonian mechanics as the description of the physical world.
"All the effects of nature are only the mathematical consequences of a small number of immutable laws." (Système du monde)
Internal Tensions
Laplace's demon survived as a philosophical thought experiment but was undermined empirically by twentieth-century quantum mechanics and chaos theory. The 1814 essay's confident assertion of universal determinism reads now as a historical artefact of pre-quantum physics, though compatibilist debates about agency continue to invoke its framework.
⧖
I. Time
Substantival, infinite, continuous, deterministic — the Newtonian-Laplacian backbone.
Attributes
Extent: Infinite
Ontological Status: Substantival
Grain: Continuous
Freedom: Deterministic
Traversability: Linear
Direction: Uni-directional
Dimensionality: One
✦
II. Space
Newtonian: substantival, infinite, flat.
Attributes
Extent: Infinite
Ontological Status: Substantival
Curvature: Flat
Dimensionality: Three
Locality: Local
◉
III. Matter
Substantival, conserved, three-dimensional, local.
Attributes
Extent: Finite
Ontological Status: Substantival
Conservation: Conserved
Dimensionality: Three
Locality: Local
◎
IV. Observer
A single embodied observer in a fully deterministic cosmos — the demon is an idealisation of what any sufficiently powerful observer could in principle know. Metaphysical agency: None.
Attributes
Time Instance: Single
Space Instance: Single
Knowledge Extent: Immediate
Knowledge Retainment: Total
Physicality: Embodied
Agency: Passive
Number: Plural
Metaphysical Agency: None
⚡
V. Energy
Conventional Newtonian.
Attributes
Extent: Finite
Ontological Status: Substantival
Conservation: Conserved
Dispersibility: Irreversible
⧉
VI. Information
Conserved at the cosmic scale by the deterministic laws (the demon's premise). Personal-identity non-conserved.
Attributes
Ontological Status: Substantival
Cosmic Conservation: Conserved
Personal Conservation: Non-conserved
Granularity: Continuous
Classified works
Works in the atlas that Pierre-Simon Laplace authored or that draw on this persona's writings, with full attribute fingerprints of their own.
Computed school proximity
The persona's attribute fingerprint scored against all 202 schools using the same quiz scorer. Useful as a sanity check on the hand-curated influences above.
Philosophical neighbors
Other personas whose attribute fingerprint sits closest to Pierre-Simon Laplace's — intellectual neighbors across traditions and eras.
93%
Bertrand Russell — 1872–1970
30/31
91%
Charles Darwin — 1809–1882
29/31
89%
Albert Einstein — 1879–1955
28/31
88%
Zeno of Elea — c. 490–430 BCE
27/29
88%
Sigmund Freud — 1856–1939
29/31
85%
David Lewis — 1941–2001
27/31
85%
Willard Van Orman Quine — 1908–2000
28/31
83%
Thomas Hobbes — 1588–1679
28/31
How Pierre-Simon Laplace resolves each dilemma
57 resolved positions across 4 dimensions, including 7 distinctive where the majority of schools go the other way.
Each dimension is sorted so minority positions come first. Mainstream positions are folded into an expandable list.
Time · 9 dilemmas · 3 distinctive
Persistence, the future, and the direction of becoming.
Distinctive · only 10% of schools agree
(20/202)
Do you really choose?
If the brain is a physical system and physical systems are governed by laws, then every choice is also a chain of causes — which raises the question of what was really left to choose.
Choice is structural illusion — every event is fixed by the prior state.
On this view, the future is fixed by the present, and the observer is a recipient of causes rather than an originator of them. The sense of choosing is real — but what is being chosen is itself a consequence of brain states that were …
Roads not taken
The future is open and you are a genuine origin of it. (69%) ·
Choice is real within a determined order — agency and determinism aren’t opposites. (9%) ·
Even if the universe is undetermined, you are not the chooser. (6%)
Distinctive · only 10% of schools agree
(20/202)
Are addicts responsible for their addiction?
Addiction looks from one angle like the textbook case of agency failing — a person doing what they don't, in any meaningful sense, want to do. From another angle it looks like agency at work in hard conditions. Which it is depends on what agency is.
The addict's behaviour is the outcome of causes; 'responsibility' is a useful fiction, not a metaphysical fact.
On this view, the addict's brain state, history, genetics, and circumstances jointly produce the behaviour, and there is nothing inside the person that could have produced anything else. Calling the addict responsible is at best a social tool — useful for the deterrent and rehabilitative …
Roads not taken
The addict could have chosen otherwise — that's why recovery is real. (69%) ·
The addict is genuinely responsible within a determined order. (9%) ·
Even if the universe is undetermined, the addict isn't the chooser. (6%)
Distinctive · only 10% of schools agree
(20/202)
Should we hold AI systems responsible for what they do?
When an autonomous AI takes an action that harms someone, the question of who or what is responsible — the developer, the operator, the model itself — turns on whether the model is the kind of thing that can be a responsible agent.
An AI's behaviour is fully determined by training and input; 'responsibility' applies if at all to its makers.
On this view, the AI's output is a function of its training data, its architecture, and the input it received. There is no extra fact about the AI that could ground its responsibility, because there is no extra fact about the AI that could have …
Roads not taken
An AI without a free will is not the kind of thing that can be responsible. (69%) ·
The AI can be a genuine agent within determined conditions — and therefore genuinely responsible. (9%) ·
Neither AIs nor anyone else are the locus of free agency; the question is the wrong one. (6%)
6 mainstream positions
How much weight do future people deserve?
Future people are as real as you are — and their interests count for as much.
47%
Is regret rational?
The past is as real as the present; regret is a real attitude toward a real thing.
47%
Do we owe extinct species something we cannot give them?
Extinct species are as real as we are; they have standing.
47%
Is the universe running out of usable energy?
Time is unbounded but matter is finite; usable energy can fail without time failing.
47%
Are natural resources fundamentally finite, or only practically so?
Time goes on but matter is bounded; we are eventually constrained even with infinite time.
47%
Could we owe future generations more than is materially possible to provide?
Time is unbounded but matter is not; we can owe more across long time than the matter can provide.
47%
Matter · 7 dilemmas, all mainstream
Is the world created from nothing?
Yes — matter was created and is conserved as a real substance.
55%
Is the physical world fully real?
Yes — the physical world is fully real, mind-independent, persisting.
55%
Does matter have intrinsic moral standing?
Matter is morally considerable insofar as it is created or conserved good.
55%
What is money?
Money is a real institution with intrinsic features.
54%
What is a nation?
A nation is a real moral community with intrinsic character.
54%
What makes someone male or female?
Sex is a real biological kind with given content.
54%
Should we edit the human germline?
Human nature is a real biological kind given by reproductive biology or by creation; editing the germline transgresses what is given.
54%
Observer · 37 dilemmas · 4 distinctive
Mind, agency, and the knower's relation to the known.
Distinctive · only 11% of schools agree
(22/202)
Who is the moral primary — the individual, the community, the cosmos, the class, or the species?
Different traditions take fundamentally different things to be the basic moral-political unit.
The species or biosphere is the moral primary.
The biological species, or the wider community of sentient life, is the moral unit.
Roads not taken
The discrete person is the moral primary. (40%) ·
The community of persons is the moral primary. (28%) ·
The cosmic-religious order is the moral primary. (14%)
Distinctive · only 12% of schools agree
(25/202)
What is our place in nature?
Whether humans are masters of nature, members of nature, or makers of nature is not a question climate science can settle. It depends on what nature is, what we are, and what kind of relationship is possible between us.
Subject to a real natural order we did not make.
On these views, nature is a real, ordered, mind-independent reality that we are inside of but did not construct. Our fundamental posture toward it is one of observation, discovery, and humility before laws that are not ours to make. Stewardship and conservation are real obligations, …
Roads not taken
Active in a real nature — we cultivate, steward, transform. (48%) ·
Nature is partly what we make of it — concepts, practices, and minds shape the world. (15%) ·
Embedded in a web — partners with the more-than-human world. (15%)
Distinctive · only 12% of schools agree
(25/202)
Should we colonize space?
The drive to extend human presence beyond Earth is sometimes framed as the next chapter of stewardship, sometimes as hubris, sometimes as escape from problems we ought to solve here. Which it is depends on what we take our relationship to nature to be.
Nature includes its limits; colonisation is bounded by what the cosmos allows.
On these views, humans operate within a given natural order whose laws and limits set the terms. Space colonisation is fine to the extent that it is actually possible — radiation, gravity wells, biological tolerances — and folly to the extent that it requires denying …
Roads not taken
Cultivating worlds beyond Earth is the next form of stewardship. (48%) ·
The 'space frontier' is partly what we make of it. (15%) ·
Colonisation continues the work that ended the wisdom of seven-generation thinking. (15%)
Distinctive · only 12% of schools agree
(25/202)
Is genetic engineering of food stewardship or domination?
Editing the genomes of the plants and animals we eat is either the natural continuation of breeding — careful improvement of what is given — or a category error that treats biology as raw material rather than as living kind.
Biology is what it is; we modify it within real biological constraints.
On these views, organisms are real biological systems with real constraints, and genetic modification is reasonable when it works within those constraints and dangerous when it ignores them. The question is technical: does this modification do what its proponents say, with the unintended consequences they …
Roads not taken
Genetic modification is cultivation by other means. (48%) ·
What counts as a 'natural' genome is itself a construction. (15%) ·
Editing the genome cuts into the relational fabric; we should be very slow. (15%)
33 mainstream positions
Could causation work backwards?
Causation runs one way — the arrow of time is real and structural.
68%
Is the asymmetry between memory and anticipation a real feature of time, or just of us?
The asymmetry is real because time itself has a real direction.
68%
Is the arrow of time a real feature of the cosmos, or only of how we describe it?
The arrow is real and structural; the asymmetry isn't an artifact of description.
68%
Is environmental damage ever truly permanent?
Damage is real and permanent on the relevant timescales. There is no recovery; there is only limitation.
66%
Can a civilization recover from collapse?
Civilizational complexity is hard to build and easy to lose; recovery is at best partial.
66%
Does the second law of thermodynamics mean something morally?
Entropy is what time is. The moral weight, if any, is the weight of working against the current.
66%
Is truth universal, tradition-bound, situated, or constructed?
Truth is mind-independent, universal, accessible in principle to all.
65%
When does a person begin?
A person exists from conception — when a new being comes into existence.
54%
What is marriage?
Marriage has a given form — it’s a kind of thing we recognize, not make.
54%
Does environmental harm in another country bind me morally?
Moral obligation tracks the relations one is in; distance does matter, structurally.
50%
Can prayer for someone far away affect them?
Prayer changes the pray-er, not the prayed-for.
49%
Are coincidences ever more than coincidence?
Coincidence is exactly what the math says it is. The pattern is in the noticer.
49%
Is divine omniscience compatible with human freedom?
The observer is in time; foreknowledge across times raises real freedom problems.
46%
Does meditation reveal something genuinely timeless?
Meditators are bounded observers reporting unusual brain states; the 'timeless' is metaphorical.
46%
Does prayer change God's mind?
If there is an addressee at all, it is in time; prayer is communication, and may genuinely change what comes next.
46%
Are the dead morally present to the living?
Observers are bounded by their own moment, and no further agency makes the dead present.
44%
What kind of religious-theological authority does the tradition recognize?
The category does not apply — the school is non-religious.
44%
Is reality fundamentally digital?
No — continuous fields, classical limits, analog deep structure.
37%
Are there indivisible units of experience?
No — continuous Jamesian stream, phenomenological lived time.
37%
Is memory stored or reconstructed?
Reconstructed — continuous re-narrating, no fixed engrams.
37%
Does history have a direction or meaning?
History is not where the deepest truth lives.
37%
What makes someone the same person over time?
You are your body — continuity is bodily continuity.
36%
Is the late-stage dementia patient still the person their spouse married?
Same body, same person — even when the cognitive pattern has changed.
36%
If a teleporter copied and destroyed you, would you have survived?
Different body, different person — you died in the scanner.
36%
Do animals have moral standing comparable to humans?
Animal minds are real because biology is the substrate of mind.
32%
Could a fetal brain organoid in a petri dish be conscious?
Brain tissue can in principle do what brains do; the question is integration.
32%
Should we trust expert testimony when we can't verify it?
Trust expertise whose conclusions a competent mind can in principle reproduce.
32%
Is religious revelation a real source of knowledge?
Revelation is evaluable by reason — and not above it.
32%
Does an LLM 'know' the things it correctly produces?
An LLM can produce correct outputs but not reason to them; useful, not knowing.
32%
What happens to "you" when you die?
Death is genuinely the end.
30%
Could an AI have a mind that matters?
No — mind is what a biological brain does, and an LLM has no brain.
30%
How is knowledge of reality produced?
Through a priori reasoning and conceptual demonstration.
25%
Is salvation, liberation, or fulfillment individual or communal?
Liberation is the realization of cosmic or species self.
15%
Information · 4 dilemmas, all mainstream
Is anything truly lost when someone forgets?
Information is lost when a mind forgets; matter and energy continue, but the pattern is gone.
51%
Does deleting your data online destroy something real?
Information is genuinely lost when the substrate that hosted it goes; deletion really destroys.
51%
Could the dead, in principle, be brought back?
The information dissipates with the substrate; restoration is in principle impossible.
51%
Is forgiveness ontologically possible?
The offense is locally constituted by its substrate; when the substrate dissolves, the offense genuinely passes away.
51%
Films Referencing This Persona (8)
Either directly referenced in the film, or reading the film through one of this persona's top schools.
Experiments Engaging This Persona's Schools
Surface via influence-schools that respond to the experiment. Each entry shows the school through which the connection runs.
Newcomb's Problem
Hard determinism takes the Predictor case as a clean illustration: your "choice" was always going to be what it is, and the Predictor read off …
Bell Test Experiments
A small minority defend superdeterminism (’t Hooft): the freedom-of-choice loophole was never closed in the metaphysically relevant sense, because no choice in a fully determined …
Libet's Free Will Experiments
A canonical empirical confirmation: "free choices" are preceded by neural activity that determines them. Libertarian free will is a folk-psychological illusion now subject to neuroscientific …
Mary's Room
Mary gains no new *fact*, only a new mode of access to facts she already knew — the "ability hypothesis" (Nemirow, Lewis) treats knowing-what-red-is-like as …
The Chinese Room
The "systems reply": the man-with-rulebook is the wrong unit of analysis; understanding is a property of the whole room (operator + rulebook + paper + …
The Double-Slit Experiment
Standard naturalism (in its post-Bohmian guise) accepts hidden variables — pilot-wave theory: particles do have trajectories, guided by a non-local quantum potential. The experiment shows …
The Ship of Theseus
Common-sense realism: the gradually-repaired ship is the same ship because that is what everyone has always meant by "the same ship." The reassembled hulk is, …
Galileo's Falling Bodies
Scientific realism vindicated: free-fall acceleration is the same for all bodies because that is how gravity actually works. The thought experiment reveals a feature of …
The Stern–Gerlach Experiment
Realists about quantum properties accept the empirical discreteness while debating whether the property is intrinsic to the atom prior to measurement (hidden-variable readings) or only …