Placeholder Criticism: The Decomposition is NOT Arbitrary

Deutsch argues the decomposition is not arbitrary: it follows necessarily from the probability calculus itself. He and Leonardis have been working on a paper to make this clearer, noting that "Popper and Miller's two papers on this are very condensed and mathematical and use special terminology they created," which has made the result difficult for others to evaluate fairly. The difficulty of presentation has been mistaken for a flaw in the argument. (Joseph Walker Podcast, Ep. 139)

Deutsch never actually explains why the decomposition is necessary. Therefore this criticism is a placeholder and to be updated once someone finds out his reasoning.

Placeholder Criticism: The Decomposition is NOT Arbitrary

Deutsch argues the decomposition is not arbitrary: it follows necessarily from the probability calculus itself. He and Leonardis have been working on a paper to make this clearer, noting that "Popper and Miller's two papers on this are very condensed and mathematical and use special terminology they created," which has made the result difficult for others to evaluate fairly. The difficulty of presentation has been mistaken for a flaw in the argument. (Joseph Walker Podcast, Ep. 139)

Deutsch never actually explains why the decomposition is necessary. Therefore this criticism is a placeholder and to be updated once someone finds out his reasoning.