The Missing Party: Quantum and Newcomb's Paradox on the Line
Forrest Bishop
Newcomb's Paradox in decision theory and the quantum measurement problem in physics have been treated as unrelated for sixty years. They share an anatomy. In each, two outcomes are correlated, the standard framing omits the shared cause that produced them, and the omission is what manufactures the paradox. Restoring the cause dissolves it. The shared cause is a physical thing, not a mental one, which is why the same move reaches both problems. In Newcomb's case it is the history of contact that shaped both the Predictor's accuracy and the Player's disposition; the accuracy stipulated in the puzzle is a calibration record the decision-theory literature mistook for a free parameter. In the quantum case it is the preparation that stamped both particles. Two correlated records, one upstream source, every causal arrow running forward in time. The tools come from Miximin Decision Theory, developed in The Miximin Order. The standard quantum formalism is left untouched: what dissolves is the appearance of backward causation and spooky action, not the arithmetic. Bell's theorem stands, and the assumption it costs is identified. The quantum probabilities are left open as a real question, separated from the paradoxes they have been filed with. William Newcomb, who invented the puzzle, never published it.
•Jun 12, 2026•0 citations