Many historical and philosophical studies treat infinity as an exclusively quantitative notion, whose proper domain of application is mathematics and physics. The main aim of this paper is to disentangle, by critically examining, three notions of infinity in the early modern period, and to argue that one—but only one—of them is quantitative. One of these non-quantitative notions concerns being or reality, while the other concerns a particular iterative property of an aggregate. These three notions will emerge through examination of three (...) central figures in the period: Locke, Descartes, and Leibniz. (shrink)

This essay examines Locke’s chapter “Of Identity and Diversity” (Essay 2.27) in the context of the series of chapters on ideas of relations (Essay 2.25–28) that precede and follow it. I begin by introducing Locke’s account of how we acquire ideas of relations. Next, I consider Locke’s general approach to individuation and identity over time before I show how he applies his general account of identity over time to persons and personal identity. I draw attention to Locke’s claim that “person” (...) is a forensic term and analyse his arguments for why the sameness of a human being and the sameness of a substance or soul are neither necessary nor sufficient for personal identity. Instead, Locke argues that personal identity consists in sameness of consciousness. Locke regards persons as moral agents who are accountable for their actions. If a person now is held accountable for a past action it is important that the person now is the same person as the person who did the action. This means that moral accountability presupposes personal identity. Additionally, it will be important to consider whether the person deserves reward or punishment for the action. Locke’s account of moral relations, which he develops in Essay 2.28, addresses this issue and I show how it supplements his account of persons and personal identity. (shrink)

This paper aims to clarify Locke’s distinction between simple and complex ideas. I argue that Locke accepts what I call the “compositional criterion of simplicity.” According to this criterion, an idea is simple just in case it does not have another idea as a proper part. This criterion is prima facie inconsistent with Locke’s view that there are simple ideas of extension. This objection was presented to Locke by his French translator, Pierre Coste, on behalf of Jean Barbeyrac. Locke responded (...) to Barbeyrac’s objection, but his response, along with a passage from Chapter XV of Book II of the Essay, “Of Duration and Expansion, considered together,” has been taken to show that he did not accept the compositional criterion. I examine these passages and argue that they are not in tension with but rather affirm that criterion. (shrink)

ABSTRACTThere is good reason to regard John Locke’s treatment of testimony as perhaps the most important of the early modern period. It is sophisticated, well developed, pioneering, and seems to ha...

ABSTRACTLocke’s influential discussion of agency in the chapter ‘Of Power’ in the Essay Concerning Human Understanding underwent important changes between the first and second edition. He reconside...

In this paper I argue that Locke takes sensitive knowledge (i.e. knowledge from sensation) to be genuine knowledge that material objects exist. Samuel Rickless has recently argued that, for Locke, sensitive knowledge is merely an “assurance”, or a highly probable judgment that falls short of certainty. In reply, I show that Locke sometimes uses “assurance” to describe certain knowledge, and so the use of the term “assurance” to describe sensitive knowledge does not entail that it is less than certain. Further, (...) I show that sensitive knowledge includes the perception of a relation between ideas, and thus it satisfies Locke’s definition of knowledge. He also repeatedly claims that sensitive knowledge is certain. So, despite recent challenges to this interpretation raised in the secondary literature, Locke really does take sensitive knowledge to be certain knowledge. (shrink)

As Locke claims that consciousness of our being is involved in all thought and perception, he treats all consciousness as some type of self-consciousness. I examine how consciousness relates to what it is about by inquiring into the intimate relations between consciousness and mental acts and consciousness and the self.

John Locke discusses the notions of identity and diversity in Book 2, Chapter 27 of An Essay Concerning Human Understanding. At the beginning of this much-discussed chapter, Locke posits the place-time-kind principle. According to this principle, no two things of the same kind can be in the same place at the same time . Just what Locke means by this is unclear, however. So too is whether this principle causes problems for Locke, and whether these problems can be resolved. This (...) is significant because the place-time-kind principle is foundational to Locke's discussion of identity. Moreover, the place-time-kind principle stands at the center of a number of lively and long-standing debates in Locke scholarship. These include the debates over the ontological status of Lockean persons, and whether Locke is a relative identity theorist, to name just two. In this paper, I offer a survey of how Locke's place-time-kind principle has been interpreted in the secondary literature. The aim of this taxonomy is to clarify where the differences between competing interpretations lie, and additionally show just how challenging it is to determine which reading is best. (shrink)

Locke seems to hold that we have knowledge of the existence of external objects through sensation. Two problems face Locke's account. The first problem concerns the logical form of knowledge of real existence. Locke defines knowledge as the perception of the agreement or disagreement between ideas. However, perceiving agreements between ideas seems to yield knowledge only of analytic truths, not propositions about existence. The second problem concerns the epistemic status of sensitive knowledge: How could the senses yield certain knowledge? This (...) essay argues that the key to solving both problems is Locke's claim that simple ideas are all real, adequate, and true. This explains why, on Locke's view, we have certain knowledge through the senses. It also explains how sensitive knowledge can consist in perceiving an agreement between ideas: perceived agreements among simple ideas of sensation are guaranteed to track relations that obtain among really existing things. (shrink)

Molyneux’s question asks whether someone born blind, who could distinguish cubes from spheres using his tactile sensation, could recognize those objects if he received his sight. Locke says no: the newly sighted person would fail to point to the cube and call it a cube. Locke never provided a complete explanation for his negative response, and there are concerns of inconsistency with other important aspects of his theory of ideas. These charges of inconsistency rest upon an unrecognized and unfounded assumption (...) that seeing entails recognition. Locke’s negative answer to Molyneux’s question is consistent with his other philosophical commitments. (shrink)

Locke characterizes sensitive knowledge as knowledge of the existence of external objects present to the senses, and in terms of an ‘assurance’ that falls short of the certainty of intuition and demonstration. But it is unclear how this fits with his general definition of knowledge, as the perception of the agreement or disagreement of ideas, and it is unclear how that assurance can amount to knowledge, rather than amounting to mere probability (which he contrasts with knowledge). Some contend that Locke (...) does not regard sensitive knowledge as genuine knowledge, but only honourifically calls it knowledge. In contrast, I argue that Locke holds that sensitive knowledge is knowledge, though he takes the conditions for it to be very different from the conditions for intuitive and demonstrative knowledge. It is not the assurance alone which Locke thinks qualifies sensitive knowledge as such: it is also the fact that the assurance arises from the actual employment of the senses upon external objects, and the fact that the senses do not generally deceive us, which he thinks qualifies sensitive knowledge as genuine knowledge. That there is a (tacit) form of externalism in Locke's account of sensitive knowledge is the main thesis of this paper. (shrink)

After having given in the "Essay" a definition of freedom which straightforwardly entails its compatibility with – among other things – God's foreknowledge, Locke surprisingly writes in a 1693 letter to Molyneux that he does not see how human liberty can coexist with divine prescience. I argue that the confession to Molyneux can be made consistent with the "Essay"'s definition by embracing the view that the problem Locke had in mind when he drafted it was not a problem concerning the (...) reality of human freedom but, rather, its value. (shrink)

This essay traces the development of the philosophical debates concerning active powers and human agency in eighteenth-century Scotland. I examine how and why Scottish philosophers such as Francis Hutcheson, George Turnbull, David Hume, and Henry Home, Lord Kames, depart from John Locke’s and other traditional conceptions of the will and how Thomas Reid and Dugald Stewart reinstate Locke’s distinction between volition and desire. Moreover, I examine what role desires, passions, and motives play in the writings of these and other Scottish (...) Enlightenment philosophers on human agency and draw attention to their underlying disputes concerning liberty and necessity. I end by reflecting on how classifications of principles of actions changed in eighteenth and early nineteenth-century Scottish philosophy. (shrink)

This paper takes up two questions regarding Locke’s doctrine of suspension. First, what motivates suspension? Second, what are the conditions under which we are motivated to suspend? In response to the first question, I argue that suspension is motivated by the desire to avoid the possible future evils that might result from acting precipitately upon some desire without suspending. In response to the second question, I argue against the common assumption that the desire motivating suspension must be an agent’s most (...) pressing desire. (shrink)

In this article, I defend the thesis that Leibniz’s rational substances always have higher-order perceptions, even when they are, say, in a dreamless sleep. I argue that without this assumption, Leibniz’s conception of reflection would introduce discontinuities into his philosophy of mind which (given his Principle of Continuity) he cannot allow. This interpretation does not imply, however, that rational beings must be aware of these higher-order states at all times. In fact, these states are often unconscious or ‘small’ (analogous to (...) Leibniz’s famous petites perceptions) and only count as reflections when they become distinct or heightened enough. Reflections thus arise out of ‘petites réflexions’ just as conscious perceptions arise out of petites perceptions. I argue, furthermore, that an analysis of some aspects of Leibniz’s theory of memory shows that he is not only committed to the thesis that rational beings always have higher-order states but that he also accepts it. I conclude by considering whether my interpretation is at odds with Leibniz’s doctrine of transcreation and also whether it has any consequences for which theory of consciousness we should ascribe to Leibniz. (shrink)

I argue that Locke’s distinction between ‘determined’ and ‘undetermined’ ideas incorporates an account of semantic indeterminacy: if the complex idea to which a general term is annexed is ‘undetermined’, the term lacks a determinate extension. I propose that a closer look at this account of semantic indeterminacy illuminates various charges of confusion, misuse and abuse of language Locke levels against his philosophical contemporaries.