The main distinction that seems to crop up is between rational reasoning and rational actions. Rational actions are about following an optimal strategy, "winning", whereas rational reasoning is about being able to reliably generate optimal strategies.

A question that confuses the two senses. "Is it rational to sign up for cryonics because Eliezer told me to?" it's probably a good strategy to sign up for cryonics if you don't want to die, but doing whatever Eliezer says may not be able to reliably generate such good strategies.