 They then derive the optimal strategies for both of the games, which turn out to be independent of the predictor's infallibility, questions of causality, determinism, and free will.Causality issues arise when the predictor is posited as infallible and incapable of error; Nozick avoids this issue by positing that the predictor's predictions are ""almost" certainly" correct, thus sidestepping any issues of infallibility and causality.Nozick also stipulates that if the predictor predicts that the player will choose randomly, then box B will contain nothing.