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Also, there are some pre flop hands that he recommends cold calling a raise in early/middle position, but the same hands in late position can only call if there are 3/4 in the pot (if at all). I don't understand this. Seems to me if you're willing to call in early position, you'd be more willing to call in late position. Can someone help clear this up for me.

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I think you need to re-read the SSHE on cold calling. If I'm remembering correctly, cold calling is very seldom the correct play (1 to 2 hands per session, NOT per orbit).

In my experience, cold calling is a pretty clear tell of a weak player. I usually note it & what they cold called with.