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Tough one. Villain doesn't seem maniac enough to do this with AJ unless you have a read that he is on tilt. I'll spew some combinatorics: stuff you don't beat that's in his range are JJ, TT, JTs, 77 (11 combos), stuff you do beat that he might take this line with are AJ, KK, QQ, AA (19 combos). I would definitely give less weight to the latter category even though there are more combos...I think you're good less than 30% of the time so you should fold.