This course provides an introduction to philosophy by way of three central topics: free will, personal identity, and knowledge. Questions explored in each of these sections include: (1) Are we free? Or are all our actions predetermined by past events and laws? If the latter, can we hold one another morally responsible for anything we do? (2) What does it take for one and the same person to continue existing across time? And what implications does this have for romantic love? (3) What is knowledge? If there is an external world beyond our own perceptions and ideas, can we know anything about it? How do we know we are not living in a Matrix?