Theories of epistemic rationality typically formulate norms of what it takes to have ideally rational beliefs or credences. Humans thinkers tend to be unable to fully comply with these ideal norms due to their cognitive limitations. Still, it is often claimed, ideal norms are relevant to human thinkers, because they are aims we are supposed to approximate, even if full compliance is out of reach. I argue that in order to defend the relevance of ideal norms for limited thinkers, we need to answer two questions: 1) What does it mean to be closer to or farther away from being ideally rational? 2) Why is it better to be closer to ideal rationality? I explain why these questions are difficult to answer, and propose strategies for overcoming these difficulties.