This part of the book develops a full positive epistemology: an account of the epistemic normativity of evidence resistance, in conjunction with novel accounts of epistemic oughts, evidence, defeat, and permissible suspension. This first chapter argues that resistance to evidence is an instance of epistemic malfunction. It first puts forth a normative picture according to which the epistemic function of our cognitive systems is generating knowledge, and epistemic norms drop right out of this function. Second, it shows how this picture accommodates epistemic obligations, which, in turn, explain the normative failure instantiated in cases of resistance to evidence. According to this view, cognitive systems that fail to take up easily available evidence and defeat instantiate input-level malfunctioning. Input-level malfunctioning is a common phenomenon in traits the proper functioning of which is input dependent, such as our respiratory systems. Since our cognitive systems, I argue, are systems the proper functioning of which is input dependent, we should expect the failure at stake in resistance cases.