There is no credible evidence for souls. There is plenty of imagination and tin-like.

If reason and logic were the best things to help us survive, I suspect we'd be a lot at it than we are. The problem is that the world around us is changing. And we're getting to the point where that actually might be true.

As I said in another thread, Doyle was an irrationalist - a far better writer than he was a thinker.

Thinking is also what the brain does. There is no credible evidence that mind or spirit or soul exists separate from brains. Furthermore, damage to the brain CAN affect the effect that is called spirit or soul. A reasonable conclusion without all the mystical mumbo-jumbo is that soul is just another name for what the brain does.