If I remember what I muck, the flop, turn, and river, and those cards end up in the bottom half of the deck, they won't be played in the next round. I noticed that I'm usually right and I don't see those cards. In a home game, one of the dealers does a poor job shuffling, the muck is placed on the top, then one riffle and a cut (so the muck ends up on the bottom). I feel that it's unethical to do this shuffle-tracking, but the AP in me wants to take advantage of this. Same thing if the sloppy dealer shows the bottom card. I've folded queens preflop after a large raise when I saw a queen in the last round and knew that a queen was in the muck from the last round, and I didn't see any aces last round (I'd be drawing to 1 out and an ace is more likely to appear on the flop or in other's hands). There ended up being an ace on the flop and someone won with ace-king. If I hadn't seen the queen, I would have called the preflop raise and folded to a large bet on the flop. Now I just feel guilty about taking advantage of the information others may not have. In blackjack, I don't feel guilty using all information I see since I'm only beating the faceless house.