{
  "title": "Newcomb's problem: exact values and simulation",
  "description": "Exact expected values for Newcomb's problem and a check by simulation: the threshold p = 1001/2000 found two ways, the dominance comparison in each state, the result when the chance of a full box does not depend on the act, the condition for an uneven predictor, and 1,000,000 simulated rounds per choice at six values of p with the gap to the exact value. Computed 2026-10-31 with a fixed seed. License CC BY 4.0.",
  "license": "CC BY 4.0",
  "license_url": "https://creativecommons.org/licenses/by/4.0/",
  "creator": "Puzzles, Charts & Dilemmas",
  "page": "https://puzzleschartsanddilemmas.com/puzzles/newcombs-problem/",
  "derived_from": [
    "Payoffs as given in Paul Weirich, Causal Decision Theory, Stanford Encyclopedia of Philosophy (substantive revision 2024-10-24), https://plato.stanford.edu/entries/decision-causal/ (facts paraphrased, no text reproduced), section 2.1, Figure 1",
    "Computed by Puzzles, Charts & Dilemmas"
  ],
  "method": "Compiled by Puzzles, Charts & Dilemmas from the data listed"
}