Abstract

The negation thesis concerning ignorance ("Nichtwissen") states that someone is ignorant about p if and only if she is does not know that p, or briefly, that ignorance is the negation of knowledge. We argue that there are no compelling arguments against the negation thesis. Even though, depending on the context of the conversation, the focus of an ascription of ignorance will be on one of the conditions for knowledge, all four types of ignorance are possible: ignorance due to falsity, ignorance due to lack of belief, ignorance due to lack of justification, and ignorance due to epistemic luck. Then we discuss the relevance of the distinction between known unknowns and unknown unknowns, and the surprising idea that every strong belief may be identified with an unknown unknown. A desire not to know can be present for a variety of reasons. It may be either symmetrical (not wanting to know whether p) or asymmetrical (not wanting to know that p if p should be true). We argue for the thesis that the desire not to know usually amounts to a desire to preserve the epistemic status quo. The potential applications of these distinctions to the alleged right not to know particularly in medical contexts are largely left open in this paper.