What's a soul?

[ledwix]

I'm tired of seeing religious threads getting flamed for lack of evidence. I do agree that the recent thread topic was illogical through both religious and scientific reasoning. I do not, however, condone becoming judgemental about what every religion is. For reasons I may discuss later, I'd also like to address the following:

What is your view on what a soul is? Do you believe souls even exist? If so, what constitutes a soul? What animals, plants, fungi, etc. have souls? Where do you draw the line?

I'll provide my input in a bit.