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Zero probability and impossibility
I was recently told "...there is likely a non-zero probability for the combined occurrence of an author writing a story in one universe, the realization of that story in a separate universe, and possibly wormhole connection between these two universes".
Using this example, does non-zero probability imply something is impossible or possible?
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$\begingroup$An event that has zero probability may be possible or impossible.
However, if an event has a nonzero probability, it must be possible; that is, it cannot be impossible.
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