Locke Defines Knowledge at the beginning of Book IV of the Essay concerning Human Understanding as “the perception of the connexion and agreement, or disagreement and repugnancy of any of our Ideas” (E IV.i.2).1 So defined, knowledge varies along two dimensions. On the one hand, there are four “sorts” of knowledge: of identity or diversity; relation; co-existence or necessary connection; and real existence. On the other hand, there are three “degrees” of knowledge: intuitive knowledge, which consists in the “immediate” perception (...) of agreement or disagreement between ideas (E IV.ii.1); demonstrative knowledge, which consists in the perception of agreement or disagreement by way of intermediate (or intervening) .. (shrink)

This article aims to defend Locke against Quine’s charge, made in his famous “two dogmas” paper, that Locke’s theory of knowledge is badly flawed, not only for assuming the dogmas, but also for adopting an “in-tolerably restrictive” version of the dogma of reductionism. It is shown here that, in his analysis of the epistemological status of scientific laws, Locke has effectively transcended the narrow idea-empiricism which un-derlies this version of reductionism. First, in order to escape idealism, he introduced the notion (...) of “sensitive knowledge of the particular existence of finite beings without us,” broadening thus his initial definition of knowledge in terms of the “perception of the agreement or disagreement of ideas” — a definition compatible with Quine’s interpretation. Sec-ondly, after showing that we can have virtually no a priori knowledge of universal truths about substances, Locke extended the notion of “sensi-tive knowledge” to the particular propositions of “coexistence” in sub-stances, appealing to the notion of “probability” for treating their induc-tive generalizations and, in particular, the phenomenological laws of sci-ence. Finally, acknowledging the essential presence of hypothetical, non-phenomenological laws in science, he anticipated much of the contempo-rary views on their role and nature, including, remarkably, a mild ver-sion of the epistemological holism championed by Quine. (shrink)

The primary aim of this essay is to explain the central elements of Locke's theory of knowledge. A secondary aim arises from the official definition of knowledge introduced in the opening lines of book IV. Though Locke's repeated statements of the definition are consistent with the initial formulation, the consensus view among commentators is that that official definition is in tension with other book IV doctrines. My broader interpretation involves an effort to render the various doctrines consistent with the official (...) definition. The order of discussion: Section 1 explicates the definition of knowledge. Section 2 explains two main divisions of knowledge – namely, its three degrees, and the four sorts of knowable truths. In Section 3, I consider whether Locke understands knowable truths on a model of analyticity. Section 4 addresses potential problems about the objectivity of knowledge, given Locke's account. Section 5 focuses on external world knowledge – Locke calls this "sensitive knowledge" and it poses special difficulties for the official definition of knowledge. (shrink)

Interpreters of Locke’s Essay are divided over whether to attribute to him a Representational Theory of Perception (RTP). Those who object to an RTP interpretation cite (among other things) Locke’s Book IV account of sensitive knowledge, contending that the account is incompatible with RTP. The aim of this paper is to rebut this kind of objection – to defend an RTP reading of the relevant Book IV passages. Specifically, I address four influential assumptions (about sensitive knowledge) cited by opponents of (...) an RTP interpretation and argue that in each case the assumption is false. (shrink)

In a focused assessment of one of the founding members of the liberal tradition in philosophy and a self-proclaimed “Under-Labourer” working to support the scientific revolution of the seventeenth century, the author maps the full range of John Locke’s highly influential ideas, which even today remain at the heart of debates about the nature of reality and our knowledge of it, as well as our moral and political rights and duties. Comprehensive introduction to the full range of Locke’s ideas, providing (...) an up-to-date account that acknowledges issues raised by recent scholarship over the past decade A well-rounded perspective on one of the intellectual giants of the western philosophical tradition Provides detailed coverage of Locke’s two key works, _An Essay Concerning Human Understanding_ and _The Two Treatises of Government_. A sophisticated analysis by a highly respected academic A vital addition to the _Blackwell_ _Great Minds_ series. (shrink)