Abstract
In Knowing and Seeing, Michael Ayers presents a view of what he calls primary knowledge according to which one who knows in that way both knows perspicuously and knows how they know. Here, I use some general considerations about seeing, knowing, and knowing how one knows in order to raise some questions about this view. More specifically, I consider some putative limits on one’s capacity to know how one knows. The main question I pursue concerns whether perspicuity should be thought of either (i) as a condition of sensory experience, (ii) as a condition of sense-based cognition, or (iii) as an interface condition, involving interrelations between sensory experience and sense-based cognition.