 Refraction is a way of representing a state of self-doubt, one in which I don’t regard the degree of belief I (think I) have as the right one to have. But despite the fact that it doesn’t have the subject attributing unreliability to herself categorically as we had in the last section, Refraction is not compatible with the combination of coherence and knowledge of one’s beliefs, since the latter two together imply SR. In this representation of what self-doubt is, it is not rational according to the probabilistic standard.