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As humans, we cannot sense things outside our sensory range. Take the visible spectrum as an example.....outside of what's 'visible' the known spectrum is vast and for all we know perhaps infinite. Who has seen, or sensed the human soul, which may or may not exist. Just as there might be other dimensional universes alongside, or inside the one we are aware of....
From the little knowledge I have about quantum physics, the possibility of the existence of a soul sounds pretty ordinary or even run-of-the-mill compared to quantum mechanics theories.
For these reasons, I remain agnostic and open-minded. Personal experience has also contributed to my thinking that pretty much all things are possible in and out of this amazing universe....