Anonymous PROBABLY WON'T and MIGHT NOT "might not" is basically "maybe won't", so the difference is between "probably" and "maybe". "probably" is just a bit less than "certainly", but "maybe" is more like half and half. So if Larry might not come to the party, it's a 50-50 chance that he'll come.
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AnonymousPROBABLY WON'T and MIGHT NOT"might not" is basically "maybe won't", so the difference is between "probably" and "maybe". "probably" is just a bit less than "certainly", but "maybe" is more like half and half.