The first half of this review article on Locke on primary and secondary qualities leads up to a fairly straightforward reading of what Locke says about the distinction in Essay II.viii, one that, in its general outlines, represents a sympathetic understanding of Locke’s discussion. The second half of the paper turns to consider a few of the ways in which interpreting Locke on primary and secondary qualities has proven more complicated. Here we take up what is sometimes called the Berkeleyan (...) interpretation of Locke, the understanding of Locke’s resemblance thesis, and Locke’s views of qualities and their relationship to powers. (shrink)

While the tradition of Locke scholarship holds that both Locke and Boyle are species anti-realists, there is evidence that this interpretation is false. Specifically, there has been some recent work on Boyle showing that he is, unlike Locke, a species realist. In this paper I argue that once we see Boyle as a realist about natural species, it is plausible to read some of Locke’s most formidable anti-realist arguments as directed specifically at Boyle’s account of natural species. This is a (...) break from the tradition because no one in the literature has yet suggested that some of Locke’s arguments in Book III of the Essay include a criticism of Boyle’s doctrine of species. Moreover, identifying Boyle as Locke’s intended target illuminates some of the more vexing passages in the Essay concerning real essences. (shrink)

This chapter brings some much-needed conceptual clarity to the debate about Locke’s scientific methodology. Instead of having to choose between the method of hypothesis and that of natural history (as most interpreters have thought), he would resist prescribing a single method for natural sciences in general. Following Francis Bacon and Robert Boyle, Locke separates medicine and natural philosophy (physics), so that they call for completely different methods. While a natural philosopher relies on “speculative” (causal-theoretical) hypotheses together with natural-history making to (...) explicate phenomena, a medical practitioner must prioritize collecting data about what remedies tend to cure what diseases over hypothesizing about the causes of the latter. (shrink)

How are we to understand philosophical claims about sense perception being direct versus indirect? There are multiple relevant notions of perceptual directness, so I argue. Perception of external objects may be direct on some notions, while indirect on others. My interest is with the sense in which ideas count as perceptual mediators in the philosophy of Descartes and Locke. This paper has two broader aims. The first is to clarify four main notions of perceptual directness. The second is to support (...) my contention that in the texts characterizing ideas as immediate objects of perception, Descartes and Locke are invoking the notion of directness I call 'objectual'. This notion is modeled on the way a picture mediates perception of the pictured object. The upshot of my account is that – with respect to the objectual notion of directness – Descartes and Locke each hold an indirect theory of perception. (shrink)

This article is an extended analysis of the most recent scholarly work on Locke's account of sensitive knowledge. Lex Newman's "dual cognitive relations" model of sensitive knowledge is examined in detail. The author argues that the dual cognitive relations model needs to be revised on both philosophical and historical grounds. While no attempt is made to defend Locke's position, the aim is to show that it is at least consistent, contrary to the received view. The final section provides textual support (...) for the interpretation. (shrink)

Ao defender, nos Princípios matemáticos de filosofia natural, a existência de uma força de gravitação universal, Newton desencadeou uma onda de dúvidas e objeções filosóficas. Suas próprias declarações sobre a natureza da gravitação não são facilmente interpretáveis como formando um conjunto consistente de opiniões. Por um lado, logo após fornecer as três definições de "quantidades de forças centrípetas" (Defs. 6-8), Newton observa que está tratando tais forças "matematicamente", sem se pronunciar sobre sua realidade física. Mas, por outro lado, no Escólio (...) Geral inserido no final da segunda edição do livro, Newton diz que foi capaz de "explicar" vários fenômenos de movimento por meio da força de gravidade - que ele mostrou ser um tipo de força centrípeta -, embora não tivesse ainda conseguido explicar a causa dessa força. Uma interpretação plausível dessas últimas afirmações é que Newton acreditava que pôde inferir, a partir dos fenômenos, a existência da força de gravidade, enquanto agente causal real de certos movimentos, mas que ainda não havia tido sucesso em descobrir a causa dessa causa. O objetivo principal do presente artigo não é aprofundar a análise histórica das declarações de Newton, mas examinar como essa questão se insere no debate mais geral sobre o estatuto epistemológico das hipóteses científicas que transcendem a experiência imediata. Segundo a posição defendida, entre muitos outros, por John Locke, tais hipóteses devem ser interpretadas como tentativas legítimas de descrever aspectos inobserváveis da realidade. Em contraste com isso, no caso específico das hipóteses sobre forças - de gravitação ou quaisquer outras -, George Berkeley argumentou vigorosamente a favor de sua interpretação como meros artifícios teóricos úteis às "demonstrações matemáticas" na ciência da mecânica. Ao longo da análise das vantagens e desvantagens filosóficas dessas posições opostas, indica-se aqui que, embora a interpretação realista pareça fazer mais justiça ao desenvolvimento real da física após os Princípios matemáticos, a interpretação instrumentalista de Berkeley tem o mérito filosófico inegável de representar uma adesão mais firme ao empirismo, que é, de um modo ou de outro, valorizado por ambas as partes envolvidas na disputa sobre a natureza da gravitação. Newton's defence, in the Principia, of the existence of a universal force of gravity immediately gave rise to a wave of philosophical doubts and objections. His own remarks on the nature of gravitation are not easily amenable of a consistent, uniform interpretation. This paper begins by reviewing briefly these remarks. Its primary objective is, however, to examine how this important scientific issue contributed to demarcate two main epistemological positions on the status of scientific hypotheses transcending immediate experience. In Newton's time, two exponents of these positions were, respectively, Locke and Berkeley. Intriguingly, Newton fuelled both the Berkeleyan, instrumentalist interpretation, and the Lockean, realist interpretation. On the one hand, immediately after offering the definitions of "quantities of centripetal forces" (Definitions 6-8), he warned that he was treating these forces "mathematically", without pronouncing on its physical status. This remark lends support to Berkeley's anti-realist interpretation of forces, as Berkeley himself was keen to point out. But in the General Scholium, at the end of the book, Newton declared that he could "explain" certain important phenomena of motion by the force of gravity, although he had not yet been able to explain the cause of this force, adding, famously, that he would "feign no hypotheses" about this issue. A natural, realist interpretation of this statement is that Newton believed that he could infer, from the phenomena, the existence of gravity, as a real, causal physical agent, but that he had not yet succeeded in discovering the cause of this cause. In discussing the shortcomings and advantages of these opposing views, we indicate that although the realist interpretation appears to do more justice to the actual development of physics after the Principia, Berkeley's interpretation has the philosophical merit of representing a firmer adherence to empiricism, a position valued, in one way or another, by all parties involved in the dispute on the nature of gravitation. (shrink)

(1996). Discursive communities/interpretive communities: The new logic, John Locke, and dictionary‐making, 1660–1760. Social Epistemology: Vol. 10, Discourse Synthesis, pp. 107-122.

This paper aims at specifying the complex links which two major and polemically related 18th-century linguistic theories James Harris' universal grammar in Hermes (1751) and John Horne Tooke's system of etymology in the Diversions of Purley (1786, 1804) bear to empiricism. It describes both the ideologicalethical determining factors of the theories and the epistemological consequences dependent upon their respective philosophical orientation (Harris using classical Greek philosophy against empiricism, Tooke criticizing Locke's semantics along Hobbesian lines). The effects within the linguistic theories (...) are examined through a comparison of the theories of determination which follow from divergent theses concerning abstraction. The analysis proposed in this paper exemplifies once more the historical question of the exact location of the compatibility/incompatibility between empiricist and non-empiricist linguistic theories. (shrink)