This is a list of some of the major unsolved problems in philosophy. Clearly, unsolved philosophical problems exist in the lay sense (e.g. "What is the meaning of life?", "Where did we come from?", "What is reality?", etc.). However, philosophers generally accord serious philosophical problems specific names or questions, which indicate a particular method of attack or line of reasoning. As a result, broad and untenable topics become manageable. It would therefore be beyond the scope of this article to categorize "life" (and similar vagaries) as an unsolved philosophical problem.Includes the Molyneux problem, Infinite Regression, Moore's disbelief, Sorites paradox, and more! See the whole list.