Researchers have suggested since the early days of quantum theory that there are strong analogies between quantum phenomena and mental phenomena and these have developed into a vibrant new field of quantum cognition during recent decades. After revisiting some early analogies by Niels Bohr and David Bohm, this paper focuses upon Bohm and Hiley’s ontological interpretation of quantum theory which suggests further analogies between quantum phenomena and biological and psychological phenomena, including the proposal that the human brain operates in some (...) ways like a quantum measuring apparatus. After discussing these analogies I will also consider, from a quantum perspective, Hintikka’s suggestion that Kant’s notion of things in themselves can be better understood by making an analogy between our knowledge-seeking activities and an elaborate measuring apparatus. (shrink)

I argue that Leibniz's rejection of the hypothesis of thinking matter on grounds of unintelligibility conflicts with his position on sensible qualities such as color. In the former case, he argues that thought must be a modification of something immaterial because we cannot explain thought in mechanical terms. In the latter case, however, he (rightly) grants that we cannot explain sensible qualities in mechanical terms, that is, cannot explain why a certain complex mechanical quality gives rise to the appearance of (...) a certain sensible quality, even while insisting that sensible qualities are modifications of bodies. I argue that the two cases are analogous in the relevant respects, and that Leibniz's (plausible) position on sensible qualities should have thrown his Principle of Intelligibility into doubt. (shrink)

Early modern debates about the nature of matter interacted with debates about whether matter could think. In particular, some philosophers (e.g., Cudworth and Leibniz) objected to materialism about the human mind on the grounds that matter is passive, thinking things are active, and one cannot make an active thing out of passive material. This paper begins by looking at two seventeenth-century materialist views (Hobbes’s, and one suggested but not endorsed by Locke) before considering that objection (which I call here the (...) Activity Argument). In discussion, I note that several philosophers of the time believed that matter was active. That view opens up a possible response to the Activity Argument. The paper concludes by looking at the views of two materialists of the time who also believed that matter was active, Toland and Cavendish. (shrink)

ABSTRACTDiscussions of the reception of materialist thought in Germany in the first half of the eighteenth century tend to focus, naturally enough, upon the homegrown freethinkers who advanced the cause of Lucretius, Hobbes, and Spinoza in clandestine publications and frequently courted the ire of the state for doing so. If the philosophers belonging to the mainstream of German intellectual life in that period are accorded a place in the story, it is only insofar as they actively set themselves against the (...) materialist threat and, in the course of working to undermine it, actually only succeeded in inadvertently drawing more popular attention to it. By contrast, in this paper I will show that it was not just insofar as the thinkers of the early eighteenth century played the role of the diligent critic and unwittingly propagated the views of their opponents that materialism can be said to have penetrated into the very mainstream of the German Enlightenment. Rather, as I will argue, there was a striking degr... (shrink)

ABSTRACTThe paper focuses on the gradual separation between materialism and mechanism in early modern German philosophy. In Germany the distinction between the two concepts, originally introduced by Leibniz, was definitively stated by Wolff who was the first to provide a definition of the new philosophical term Materialismus, and of the related philosophical sect. In the first part I describe the initial identification of mechanism and materialism in German philosophy between the last decades of the seventeenth century and 1720. Mechanism is (...) here mostly conceived within a monistic metaphysics of body, which refers mainly to Hobbes and to some interpretations of Spinoza’s pantheism. This tight connection between a mechanical explanation of nature and the Deus sive natura issue leads to a negative judgement on mechanism and its materialistic implications, both charged with a form of more or less explicit atheism. In the second part I describe the gradual emancipation in Germany of mechanism fro... (shrink)

Leibniz’s claim that it is possible for us to gain metaphysical knowledge through reflection on the self has intrigued many commentators, but it has also often been criticized as flawed or unintelligible. A similar fate has beset Leibniz’s arguments against materialism. In this paper, I explore one of Leibniz’s lesser-known arguments against materialism from his reply to Bayle’s new note L, and argue that it provides us with an instance of a Leibnizian “argument from reflection”. This argument, I further show, (...) does not constitute a flawed appeal to mere introspection, but is in fact securely grounded in an important corollary of the Principle of Sufficient Reason: Leibniz’s Principle of Intelligibility. (shrink)

ABSTRACTThis paper discusses how early modern materialism can be defined and delineated, before turning to a brief survey of the main philosophical resources early modern materialist theories draw on. Subsequently, I discuss competing overall narratives concerning early modern materialism, and conclude with a defence of the controversial view that material soul theories belong to materialism proper.

The “hard problem” of consciousness is a challenge for explanations of the nature of our phenomenal experiences. Chalmers has claimed that physicalist solutions to the challenge are ill-suited due, in part, to the zombie argument against physicalism. Perry has suggested that the zombie argument begs the question against the physicalist, and presents no relevant threat to the view. Although seldom discussed in the literature, I show there is defensive merit to Perry’s “parry” of the zombie attack. The success of the (...) maneuver suggests a slight softening of the hard problem of consciousness for physicalists. (shrink)