 Obviously, there is to be no fast and easy resolution of this debate—not least because the nature of status of the a priori, as well as what is required for knowledge, for example, are themselves hotly contested. (For general discussion of the a priori, see Russell 2014; for a representative sampling of current work on the topic, see Casullo and Thurow 2013. Ichikawa and Steup 2014 provide an overview of issues surrounding knowledge.) For our purposes, however, what is especially noteworthy is that some of the very same worries as Siegel and BonJour register about Kornblith’s attempt to cast epistemology as “empirical all the way down” have been voiced by Alvin Goldman, himself an extremely prominent advocate of NE: