Comment: Someone Please Explain the Provisional Ballots

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Someone Please Explain the Provisional Ballots

I stopped campaigning to get my friend to register Republican after Feb 15th. Some of them I didn't get to in time (their skulls were a little dense), but eventually broke through, but it was after 2/15.

But in district 6, I thought I clearly heard the moderator explain that if you weren't registered by 2/15 as GOP you'd vote provisionally, and your provisional ballot would only be counted if it was deemed mathematically to be in play...
Excuse me??? WTF!! What exactly is the practical difference then from it being an actual vote, if it only counts if the math deems it would matter?? Other than of course it would be counted in secret.

Please someone tell me I'm missing something.