Berkeley's Thought (review)

Pappas' work is a judicious interpretation of three major themes in Berkeley's thought: his denial of abstract general ideas, theory of immediate perception, and appeal to common sense. Pappas modestly characterizes his aim to illuminate how these themes are connected as one of many ways to approach Berkeley's philosophy. This book, though, is no modest accomplishment. Given the fundamental character of the first two themes and the skill with which he explores them, Pappas does more than connect three themes. He illuminates Berkeley's positions on matter, existence, essepercipi, and the Luce-Jessop thesis that Berkeley is a common sense realist (CSR). The book is broader in scope than its modest beginning suggests. It is a first-rate commentary, meticulous yet highly readable.

Chapter I outlines Pappas' thesis and the hermeneutical distinctions he applies in his analysis and evaluation of Berkeley's arguments. He distinguishes two ways of evaluating theories: in light of the assumptions and standards operative when it originally appeared, and in light of those operative in our time. Judged either way, Pappas defends Berkeley's modern temper and continuing relevance, for his arguments fare better than commonly supposed.

The next three chapters cover Berkeley's opposition to abstract ideas; Locke's version mainly, but Malebranche, Leibniz and others are mentioned. Pappas convincingly argues that the denial of abstract ideas is fundamental to Berkeley's position on existence, perception and other central tenets of immaterialism. He opens by criticizing the thesis that Berkeley's rejection of the doctrine is "localized;" textually to the "Introduction" to the Principles, and philosophically to Berkeley's defense of nominalism and his views on language. This thesis, Pappas proves, is too narrow. He marshals textual evidence from the body of the Principles and other works to show the breadth of Berkeley's concern over the problems the doctrine engenders. He then examines the impact of the doctrine, if unchecked, on Berkeley's positive views.

Pappas shows how such concepts as material substratum, primary and secondary qualities, existence as a predicate, and representationalism involve abstract ideas. This makes Berkeley's plan of attack plain: if abstract ideas can be undermined, the negation of the related concepts follows. The arguments required to accomplish this, however, are more sophisticated than many realize. To show this, Pappas distinguishes four types of abstract ideas. He then sorts out which of Berkeley's arguments go with which type of abstract idea, which arguments do and do not work, and how they might be repaired. Though Pappas admits that some modified versions of the concepts might survive Berkeley's criticisms, he holds that Berkeley's arguments are largely successful especially against Locke's versions of these doctrines.

Pappas also ties Berkeley's denial of abstract ideas to his heterogeneity thesis (HT) defended in New Theory of Vision. This thesis maintains that what is perceived by one sense is numerically and specifically distinct from what is perceived by another; round as seen is distinct in both senses from round as touched. Berkeley considered HT an advance in perception theory andsaw abstract ideas as a threat. To admit an abstract idea of round would imply that there is an idea of the same kind common to sight and touch. Since this would undo HT, Berkeley had to combat abstract ideas. Berkeley's independent arguments against abstract ideas do not entail the truth of HT, Pappas holds, but they remove one source of evidence an opponent might use against it.

New Theory of Vision also introduces Berkeley's concept of immediate perception. On the basis of this and the broader concept used in Berkeley's later works, Pappas establishes that "physical objects" (collections of sensible qualities) are the objects of immediate perception. This allows Pappas to make some sense of the claim that Berkeley can be read as a CSR. To do this, Pappas distills ten commitments of CSR and demonstrates...