The document summarizes some of the basic philosophical doctrines of Buddhism, such as momentariness, relative existence, no-self, no God, dependent origination, karma, and nirvana, and then discusses philosophical problems with each doctrine. Some of the key issues raised are that if nothing is enduring then the principles of identity, causality, and karma are problematic; and Buddha's refusal to characterize nirvana presents a non-answer to the nature of existence. Overall, the document evaluates Buddhism by analyzing philosophical inconsistencies within its core doctrines.