Seeing and demonstration (Perception)

We see things. We also perceptually demonstrate things. There seems to be some sort of ling between these two phenomena. Indeed, in the standard case, the former is accompanied by a capacity for the latter. One sees a dog and can, on the basis of one's perceptual capacities, think thoughts of the form 'That is F.' But how strong is that link? Does seeing a thing (in the success sense of seeing) inevitably bring with it the capacity for perceptually demonstrating it? In what follows, we argue for a negative answer to this question. In so doing, we hope to shed some light on the phenomenon of perceptual demonstration. After presenting the main argument in section one, we go in section two to consider a series of objections and replies.