can i lay this down?

[zipppy]

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Easy...you're usually dominated in this situation and it's a prime spot to lose many chips.

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I assume the OP is talking about laying down to the river bet of 50. If I had come this far in the hand, I wouldn't lay down my top pair to a bet of 50 into a pot of more than 300. If nothing else, it helps me see how my opponent played whatever hand he was calling with til the river.