Who's the real Captain Kirk?
By Jason LimTim Urban recently published a fascinating piece in WaitButWhy.com titled “You are not your brain or your body,” exploring the various ways we attempt to define what “me” means. He goes through several prevailing theories that make for interesting thought experiments.The first is the body theory, in which the physical body is equated with the sense of me. In short, I am my body. However, this theory falls apart fairly quickly when you bring up the fact that most human cells are replaced regularly as we age. Sure, there are some specialized cells that are never replaced, but, by and large, the cells that you are born with are not the cells that you have today. And if we are made up of cells, and they are replaced, does it follow that I am no longer fully me when I shed my skin cells? The second is the brain theory, in which the brain is equated with the sense of me. Since all cognitive processing and memories that give rise to my personality, quirks and habits are housed in the brain, then my brain must be me. Sounds reasonable until Urban
