Feynman Path Integral's Meaning

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Super good question.

I do not know. It is great to know that there are still areas in physics still to be understood. :)

Thanks, I wish I was the guy/gal who thought of that question! I would say that we can live safely in the knowledge that barring massive alterations to humanity, we'll die with many myteries still unsolved. I find that oddly comforting.