[Wynton]

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As you can see, when you don't cap AA preflop we deviate from the fundamental theorem of poker. More importantly, we leave ourselves increasingly susceptible to more major deviations from the Theorem post-flop. Bad, bad, bad.

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I want to add that this is the most persuasive reason I've seen for capping. I spend so much energy trying to figure out whether I can trick my opponent into putting in an extra bet, that I forget that such ploys often end up merely tricking myself into more difficult situations.