Soles? Oh yes, two of them, but I imagine you meant "soul".
I think a soul is a very complex idea which would require one hell of a definition. For an example, you can imagine and communicate abstract ideas such as music and paint. Hypothetically, of course, as I don't know whether you dabble in these things. On the other hand, a monkey can't actually paint. The closest we have to a painting chimp or a gorilla are trained ones that produce some pieces on cue. One or several pieces they were trained to produce. One can argue that humans have a soul because of our artistic abilities.
Even if you can't paint a Bob Ross style forest, you can, hypothetically, shit on a canvas, call the piece "life", and sell it to some moron for millions of dollars. What's more, they'd be happy to cough up the dough! You will then be called the greatest painter on Earth and be praised for your artistic, soul crushingly blunt capabilities and die a hero's death, be buried with full military honors, and be praised for millenias to come! All because you took an impressively horizontal shit on a canvas.
For others, a soul is a little white like that keeps them going. After death, once their consciousness is gone, their soul will ascend to a higher, unfathomable plane of existence and be thrown into heaven where they will be in a state of bliss for all of eternity while their rivals burn in hell.
After all, we're all the protagonist of our own story.
Okay, that's one heck of a white lie.
I've read of a man performing an experiment: he weighted the freshly dead and concluded that, once enough time has passed and the soul leaves the body, before post mortem hits, the body loses roughly 4 grams of something. That something must be the soul.
To each, a soul is their own thing. I'd like to believe humans, along with every other living creature, plants included, do have souls. As for the question of what a soul actually is, I'm afraid I can't answer that. Each person views a soul on their own terms. Personally, I don't even understand mine.
