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I almost never see a check-raise preflop, esp. UTG, that isn't A's or K's

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Many times it's just the combination of the two.

Why would Villain limp A's or K's UTG? If the table was very aggressive and there was a PFR almost every round it's possible but otherwise you're just inviting ppl to crack your big hand.

I think you're most likely a small favorite over his range. Call and start loving money again.