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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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    I can't parse (gramatically) the question.2012-06-27

1 Answers 1

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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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    And Nicholas, I probably should say this: I'm pretty good at reading mediocre-to-poor English and quite patient about trying to parse it out. In general you should not expect this. Your current wording of the question is reasonably good, but your wording of the statement you were told is almost incomprehensible. I could be wrong, but I would assume this is the reason for the downvotes.2012-06-27