A Philosophical Essay on Probabilities
1814 — incl. Laplace's demon (intellectus perfectus)
Work
1814 essay; famous passage on an intellect that would know the entire future from present state — a conditional we accept in principle, not a total-ledger architecture.
Primary publication. Laplace, P. S. (1814). Essai philosophique sur les probabilités. Paris: Courcier. English: Truscott, F. W., & Emory, F. L. (trans.). A Philosophical Essay on Probabilities. Dover reprint.
Famous passage (paraphrase). An intellect that knows all forces and positions at one instant could deduce the entire future and past — the Laplace demon.
Claims we use
- In principle. If every state and every law of physics were known, and computation were unlimited, producing a prediction of the future would be possible. We share that view — it states what Rᶜ would mean under ideal conditions, not what any capture system achieves.
- Not as architecture. A ledger that holds everything must also log its own writes — it is part of the universe it tracks. That self-reference is an infinite loop: the record never finishes catching up with itself.
- Observer inside the system. Every measurement changes the measured object. Capture is never passive omniscience; residual uncertainty and mode-dependent evidence remain.
Corpus use
Supports The Real — Rᶜ knowable in principle through experience; in practice capture is always incomplete, and no single ledger closes the loop.