The Nature and Reality of Objects of Perception
In every case in which the author judges with regard to something which he seems or feels with his hands, that it is a so-and-so, simply because he do perceive, by sight or touch, that it is in fact a thing of that kind, he thinks, fairly say that the judgment in question is a judgment of perception. And enormous numbers of judgments of the kind are, quite plainly, judgments of perception in this sense. It is true that, if certain views which, if he understands them rightly, some philosophers have seriously entertained, were true ones, it would be quite impossible that any of them should be judgments of perception. What the author wish to maintain, and what seems to me to be quite certainly true, is that his perception of this inkstand is dependent on this sense-datum, in a quite different and far more intimate sense than this.