[rakes.a.beach]

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you can't be bluffing if no better hand ever folds which is most definitely the case here. just because a limited number of worse hands calls doesn't mean it's not for value.

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and just because no better hand every folds doesn't make it NOT a bluff.

IE: you shoved on the river with air putting villain on small pocket pair.. He's a donk and called you. That'd be a bluff even though donk was never folding any part of his range that got there on the river, say, on a KKKAQ board.