Upon dissection of the human brain, aside from some jelly-type matter, nerve fibers and perhaps neurotransmitters, all of which come into play in our thought and motor functions, there emerges not a shred of evidence of a substance that produces a sense of humor, the appreciation of art, or the ability to differentiate between good and evil. Even if not the precise method, at least a clue as to how these human qualities are produced would, I think, have been in order at this advanced stage of the twenty-first century. But nothing! Zilch! This seems to fly in the face of the principle a "whole is equal to the sum of its parts:" whereas the human brain seems to be the seat of consciousness, its biological components do not seem to possess the potential of producing such a quality.
Is it possible that "consciousness" actualy is a separate entity and has no physical roots? And can it's effect on humans be taken as proof that such an entity exists? "Black holes," despite the fact that they cannot be directly detected, are universally accepted as science.
A black hole in astronomy is a celestial object of such extremely intense gravity that it attracts everything near it and prevents even light from escaping. Because light and other forms of energy and matter are permanently trapped inside a black hole, it can never be observed directly. It can only be detected by the effect of its gravitational field on nearby objects. Yet, as undetectable as they are, black holes are considered as real and as scientific as planets and stars.
In the same way, consciousness can be "proven" to have its own existence by the effect it has on humans, giving them qualities such as reasoning abilities, appreciation of art, humor, etc. Unlike a black hole, however, since we cannot prove the existence of any physical substance or process that can produce such features, consciousness takes on a unique existence -- an effect without a physical origin. Call it what you will, but this precisely coincides with the age-old concept of a "soul."
I realize that a soul in itself may not be a scientific concept. But when you can prove its features and qualities as surely as you can prove a black hole's effect on its environment, you have effectively proven its existence. Unlike a black hole, it's origin does not appear to be physical, but, very much like a black hole, it definitely reveals itself within its environment.
Unscientific, at this point, would be to deny that an entity exists that gives human beings their unique intellectual features. There is no question that it exists. The only question is, what do you call it? If "soul" is to religious sounding for you, call it what you will, but there is definitely something at work here that is not of a physical nature.
If you don't believe a "soul" has been proven here, you may want to start questioning things like black holes. Nobody will prove them to you any better.