There's too much spiritual/mystical "baggage" attached to the word "soul." People have minds, they have identities, they're not just bodies or just objects in the world. There are things about them that you can't perceive by looking at them, there are things about them that you probably can't perceive at all. I don't have a problem with someone calling all that a soul. But I think that when it's gone, it's gone for good.