 The main problems with the many-minds theory concern its commitment to a strong mind-body dualism and the question of whether the sort of mental supervenience one gets is worth the trouble of postulating a continuous infinity of minds associated with each observer. Concerning the latter, one might well conclude that a single-mind theory, where each observer has precisely one mind that evolves randomly given the evolution of the standard quantum mechanical state and determines the observer’s experiences and beliefs, would be preferable. (See Albert, 1992 and Barrett, 1995 and 1999, for further discussions.)