Full Idea
We think it is a mistake to suppose that the evidence of our senses comes to us in the form of beliefs; in perception, the beliefs we form are almost invariably about the objective properties of physical objects - not about how they appear to us.
Gist of Idea
Sense evidence is not beliefs, because they are about objective properties, not about appearances
Source
J Pollock / J Cruz (Contemporary theories of Knowledge (2nd) [1999], §2.5.5)
Book Reference
Pollock,J.L./Cruz,J: 'Contemporary Theories of Knowledge (2nd)' [Rowman and Littlefield 1999], p.61
A Reaction
The tricky word here is 'evidence'. At what point in the process of perception does something begin to count as evidence? It must at least involve concepts (and maybe even propositions) if it is going to be thought about in that way.