Overview: Mike Responds to Michael from VSauce's philosophical question: Are the bacteria and skin cells that live on your body "You"? Check out VSauce's original question in "A Real No-Brainer" here: http://www.youtube.com/watch?v=3teflb1QNN4&t=6m16s A couple folks have correctly pointed out I flubbed the names of the philosophical schools of thought. Which I did. That. Time to reread Russell's History of Western Philosophy! And speaking of books: this is an *extreme* distillation of some really complex and interesting stuff. If you're interested in doing more reading, a bunch of very smart people have tackled this topic.