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> I think it's unrelated. You could say dolphins and whales are "tolerant of hypoxia", yet from their behavior and the layout of their brains it is evident that evolution has not limited "information efficiency" in exchange for "tolerance to hypoxia".

Not all species will make the same tradeoffs or converge on the same solutions, though.

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Usually though if a tradeoff doesn't exist then it doesn't happen. In this case, most likely it's not a tradeoff that's going on it's just parallel lines of evolution.

It's possible that there are other corollary markers that make a trade off possible in one situation and not possible in other situations.

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