not farfetched to think that minds can exist separately from bodies. Now we know better. We know that the brain is the locus of experience, that there are many ways in which the brain can be vulnerable to illusions, dreaming being an obvious case. There's brain activity when we're asleep and that's why we experience things. But, before modern neuroscience, it wasn't such a crazy belief. One other ingredient is that we depend for our beliefs on other people, on experts.i believe a lot of things that I have no basis for believing in my own experience.