Situation while "running it twice" during home cash game

[Lottery Larry]

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One person must win both pots outright. Anything else means a 50/50 split.

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What is this, some weird variation of the pig rule?

Each hand is treated separately- you are basically playing TWO poker hands, for 1/2 the pot each time.

If you wouldn't award a full pot for a split hand any other time, why are you doing it now? If you have to win twice outright, why would you ever agree to run it twice?

75% OP, 25% for the goof