For instance, suppose we adopt a representationalist theory of perception (and really, I think all the evidence supports at least some minimal sort of representationalism about perception). Then we could say that, when I look at a chair, what I am seeing is not the external, objective chair itself. Rather, what I am seeing is my mental construct of the chair. In essence, my mental construct of the chair represents the external chair, and acts as a sort of proxy of it for me. Thus, we could say that I do not have immediate knowledge of the objective chair itself, but rather that my knowledge of it is mediated by my mental constructs, and in this sense, I only have a mediate acquaintance with the chair.