I am speaking here of the essential soul - that without which you would not be who you are. It includes consciousness, certainly, and what else I am not sure.
There are philosophers that maintain there is no essential soul and no consciousness. As William James put it
Quote:
"I believe that 'consciousness,' when once it has evaporated to this estate of pure diaphaneity, is on the point of disappearing altogether. It is the name of a nonentity, and has no right to a place among first principles. Those who still cling to it are clinging to a mere echo, the faint rumor left behind by the disappearing 'soul' upon the air of philosophy."
This seems obviously wrong to me, but here is a little thought experiment that seems to confirm the existence of an essential soul.
Suppose technology could offer you, at some point in the future, a quick, painless operation to replace your heart with a much superior robotic heart, one that would always be strong and healthy. Almost certainly you would take the offer. The same would be true if you were offered superior replacements for almost any organ. You would probably even accept an offer of an improved memory, an improved reasoning faculty, etc. But would you accept a replacement for your whole brain? I thought not! Nor would those who maintain that consciousness does not exist, though they might lie about it! Even simpler, you could be offered the latest model of a Terminator as a replacement for all of you, after appropriate downloading of memories, with you then being shot in the head. I bet you wouldn't take that deal either!
Now, do you think there is any single atom in your brain in which the soul resides? Probably not. I don't think any neurosurgeon would believe that there is some critical atom that holds your soul. Sometimes neurosurgeons even remove half the brain to suppress epileptic fits. Do you think when they do so they are taking a 50-50 chance of removing your soul? I doubt it.
But, if there is an essential soul and it cannot be removed by physical means, it must not be material.
What's wrong with this reasoning?