Abstract

The dissertation contains eight chapters in which I provide an interpretation of the resemblance theses and the primary-secondary quality distinction in John Locke's An Essay Concerning Human Understanding. ;In chapters one through four, I analyze John Locke's famous claims that ideas of primary qualities resemble primary qualities, but that ideas of secondary qualities fail to resemble secondary qualities. There are two dominant traditions of interpretation of these resemblance theses. The first tradition claims that Locke draws this distinction from introspective awareness of the representational character of ideas of sense. The other tradition claims that Locke conceives of these resemblance claims as pure entailments of an anterior theory of material substance to which he wholeheartedly subscribes. I argue that both of these traditions misfire on the interpretation of the resemblance theses. Instead, Locke's use of resemblance is situated in a tightly circumscribed debate with the Scholastic-Aristotelians on the nature of perception and body. This provides a way of understanding Locke that does not punish him with vulnerabilities that beset the traditional ways of looking at his resemblance theses. ;In chapters five through eight, I analyze John Locke's distinction between primary and secondary qualities. I investigate the work of Robert Boyle and trace the possible contours of his influence on Locke. In Boyle's scientific writings, the so-called mechanical affections or primary modes of matter are the ancestors to Locke's primary qualities of body, and the non-mechanical powers or sensible qualities are the ancestors to Locke's secondary qualities. In Boyle, it is hard to know exactly what the ontological relationship is between mechanical affections and powers. One thing, however, is clear. Identity cannot be the relation. In Locke, however, I argue that there is good reason to deny that primary and secondary qualities of body are ontological distinct. They are conceptually distinct, but there is good reason to believe that Locke takes them to be ontologically identical in body. The burden of this portion of the dissertation is to offer both textual and philosophical reasons for motivating this interpretation of Locke