Balancing Bluffs vs Balancing Strategy

[jjacky]

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The only thing that really needs to be randomized are hands that require mixed strategies, and there are quite likely to be very few of those.

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do you think this statement is also true preflop?

i imagine, that the number of holdings that require mixed strategy on the current street decreases more and more (that is beacause the information revealed by ones own actions gets less and less important). what do you think about that?