This started hundreds of years ago with "things only exist because I believe they do". The whole computer thing is a twist on that, but why? Is a computer reall

This started hundreds of years ago with "things only exist because I believe they do". The whole computer thing is a twist on that, but why? Is a computer really the best way to make this happen? It feels to me that a brain would be a better fit to the job. Not that I believe any of it.