Abstract

Since replying to objections is a familiar philosophical practice, there is nothing very surprising about the presence of such replies here in the Principles of Human Knowledge. The author of the objections is George Berkeley and he decided which objections to answer and in what order they would appear. Berkeley points out that on his criterion, an idea of a thing that is extended, solid, and heavy will be the idea of a real thing. Berkeley says that extension belongs to mind because it exists when perceived; it is a manner of being perceived by a mind. It is not an accident of mind, but instead exists because of something a mind does. The mistake the philosophers are driven to making, according to Berkeley, lies in misunderstanding the nature of the cause of our ideas. Berkeley's own position then is designed specifically to address the mistakes of the philosophers and to provide a better theory.