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. Similarly expansive “questions” shall also be omitted, as will fields e.g. bioethics, feminist ethics which pose philosophical problems without being philosophical problems themselves.

via List of unsolved problems in philosophy – Wikipedia, the free encyclopedia.