



A Note on Deutsch’s Quantum Mechanics and Decision 

This page was last edited on 12/31/00 by Malcolm R Forster 

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David Deutsch has a forthcoming article called "Quantum Mechanics and Decision" in which he claims to derive the standard probabilistic interpretation of the wavefunction for nonprobabilistic considerations. In this note, I try to develop his argument in a classical context, to see whether the same ideas can generate probabilistic conclusions from nonprobabilistic assumptions in a more general way. While my answer is negative, the attempt pinpoints the parts of Deutsch’s quantum mechanical argument that must rely on special features of the formalism (assuming that his proof is correct). 
Deutsch, David (to appear). "Quantum Theory of Probability and Decisions." Proc. R. Soc. Lond. A. The preprint is available online. 