 Not every concept is analyzable into more fundamental terms. This is clear both upon reflection on examples—what analysis could be offered of hydrogen, animal, or John F. Kennedy?—and on grounds of infinite regress. Why should we think that knowledge has an analysis? In recent work, especially his 2000 book Knowledge and Its Limits, Timothy Williamson has argued that the project of analyzing knowledge was a mistake. His reason is not that he thinks that knowledge is an uninteresting state, or that the notion of knowledge is somehow fundamentally confused. On the contrary, Williamson thinks that knowledge is among the most fundamental psychological and epistemological states there are. As such, it is a mistake to analyze knowledge in terms of other, more fundamental epistemic notions, because knowledge itself is, in at least many cases, more fundamental. As Williamson puts it, we should put “knowledge first”. Knowledge might figure into some analyses, but it will do so in the analysans, not in the  analysandum.[35]