Mary the Scientist
This argument is put forth by Frank Jackson. Mary is a scientist confined to a room where everything is black and white. She learns every fact about the physical world, or just about everything there is to know about the physical world and how it works. If physicalism, the view that all that there is entirely physical, is true, then Mary knows everything there is to know, and so she knows everything. There isn't something she doesn't know. Yet, this does not seem true. If Mary were let out to the world and experience something Red, it would be said that Mary has actually learned something, which is, redness. She knows what it is like to experience redness. So, physicalism is false. This is the knowledge argument against physicalism. This doesn't seem convincing to me. First, it seems to assume that if physicalism is true, then everything must be expressed as a proposition. Even if physicalism was true, that wouldn't follow. Say Mary didn't know what stra...