I've wondered about this and whether it might someday be testable. One thing I keep coming back to is the brain's apparent search power: you see a 5s video clip

I've wondered about this and whether it might someday be testable. One thing I keep coming back to is the brain's apparent search power: you see a 5s video clip and can recall the show. This means your brain can trawl all your memories of all the movies and shows that you've ever seen, without generating a fraction of the heat energy of search done in a computer. It's pretty weird to think our brains can actually do this without help...