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I'm pretty clearly beaten on the turn, right? Should I have even called the flop?

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I don't see why you called the flop. What do you think you're beating or drawing to? It's one thing to bet with TPTK head's up, or even raise with it (basically a bluff). In Omaha, calling with it is almost never the right thing to do unless you have a solid draw (around 12 big outs or more).