Online research in philosophy

Published in: Cogito, 2 (1988) pp 10 - 12. Pdf version Modern physics has cast doubt on Newton's idea of particles with definite properties. Do we have to go back to Aristotle for a new understanding of the ultimate nature of substance? If we ask, `what is the nature of substance?', we might be told that this substance is salt, that one is copper, or that the atomic nucleus is a mixture of protons and neutrons. But what are all these substances? What do they have in common which makes them substances? We don't seem to think that such things as colours, numbers, or shapes are by themselves `substantial enough' to be substances in their own right. We therefore change our question to `what is it to be a substance?', or to `what is the ultimate nature of the simplest substances?'. We might first turn to scientists for an answer, to physicists in particular.

: Descartes maintained substance dualism, the thesis that no substance has both mental and material properties. His main argument for this thesis, the so-called separability argument from the Sixth Meditation (AT VII: 78) has long puzzled readers. In this paper I argue that Descartes’ independence conception of substance (which Descartes presents in article 51 of the Principles) is crucial for the success of the separability argument and that Descartes used this conception of substance to defend his argument for substance dualism from an important objection.

This book offers an original new account of one of Aristotle's central doctrines. Freudenthal He recreates from Aristotle's writings a more complete theory of material substance which is able to explain the problematical areas of the way matter organizes itself and the persistence of matter, to show that the hitherto ignored concept of vital heat is as central in explaining material substance as soul or form.

Aristotle’s discussions, in Metaphysics Delta 7 and 8, of things designated by the terms we translate ‘being’ and ‘substance’ are revealing in several respects. The discussion in chapter 7 reveals the centrality in his thinking of the distinction between in itself and accidental being, a distinction different from that between substance and the other categories. The discussion in chapter 8 in turn reveals not only two related criteria for calling things substance, but a distinction as well between entities that are called substances and the substance being which is the principle of their being so called.

This is a survey of Aristotle's development of the concept of substance in the Categories and Book VII (Zeta) of the Metaphysics. We begin with the Categories conception of a primary substance as that which is not "in a subject" -- i.e., not ontologically dependent on anything else -- and also not "said of a subject" -- i.e., not predicated of any item beneath it in its categorial tree. This gives us the idea of primary substances as ontologically basic individuals, the fundamental subjects of predication and of change. We then examine the conception of substance in Metaphysics Zeta, where Aristotle is interested not just in the question of what the primary substances are, but in the question of what makes them substances, or, as he would put it, what the "substance OF something" is. The conception of substance that Aristotle ends up with seems (as has been frequently noted) to be threatened with inconsistency, in that Aristotle seems to want to maintain, simultaneously, that (i) substance is form, (ii) form is universal, and (iii) no universal is a substance. Two main approaches toward resolving this inconsistency are considered, and a sketch is provided of how one of these approaches might be fleshed out. On the line I propose, the substantial form of a material compound is predicated accidentally and universally of the matter of that compound, but it is not the substance of the matter of which it is predicated. Rather, it is the substance of itself; but since it is the cause of the compound's being essentially the kind of thing that it is, the substantial form is, in a derivative way, the substance of the compound as well.

Individual substances are the ground of Aristotle’s ontology. Taking a liberal approach to existence, Aristotle accepts among existents entities in such categories other than substance as quality, quantity and relation; and, within each category, individuals and universals. As I will argue, individual substances are ontologically independent from all these other entities, while all other entities are ontologically dependent on individual substances. The association of substance with independence has a long history and several contemporary metaphysicians have pursued the connection. In this chapter, I will discuss the intersection of these notions of substance and ontological dependence in Aristotle. I will canvass a few contemporary formulations of ontological dependence and discuss some of the interpretative difficulties in ascribing any of these formulations to Aristotle’s characterization of individual substances as ontologically independent. My aim is not to resolve fully these difficulties but to locate the topics of substance and independence relative to certain other controversies in Aristotle studies. However, I will sketch a position. In particular, elsewhere I have speculated that Aristotle is both a primitivist and a pluralist with respect to ontological dependence, and I will develop this line of interpretation a bit further later in the chapter.

This book is a complete re-thinking of Aristotle's metaphysical theory of material substances. The view of the author is that the 'substances' are the living things, the organisms: chiefly, the animals. There are three main parts to the book: Part I, a treatment of the concepts of substance and nonsubstance in Aristotle's Categories; Part III, which discusses some important features of biological objects as Aristotelian substances, as analysed in Aristotle's biological treatises and the de Anima; and Part V, which attempts to relate the conception of substance as interpreted so far to that of the Metaphysics itself. The main aim of the study is to recreate in modern imagination a vivid, intuitive understanding of Aristotle's concept of material substance: a certain distinctive concept of what an individual material object is.

In the Categories Aristotle defined substance as that which is neither predicable of nor in another.1 In saying that a substance is not predicable of another, Aristotle meant to exclude genera and species from the category substance.2 A man is a substance but not man. In saying that a substance is not in another, Aristotle meant to exclude property particulars from the category. A man is a substance, not his color.3 The Categories treats substances as simples. Though a particular substance, Bucephalus the horse, has parts, it is nevertheless a single entity in the category substance and, hence, incomplex in the way a black thing or a running man are not.4 Black things and runners are complex because ..

It is here argued that Locke and Newton held very similar views on the nature of our knowledge of substance: our only cognitive access to substances is through their powers to affect our minds and other substances. However, in spite of this shared empiricist foundation, Locke and Newton held divergent views on the unification of powers or qualities into a single substance. While Locke allows that distinct powers can be understood as united in one substance (indeed all substances are collections of powers for Locke), this paper argues for an interpretation of Newton according to which substance cannot have distinct powers. Rather, a substance just is a power in space and time.

Substance: Its Nature and Existence investigates the very nature and existence of individual substances, including both living things and inanimate objects. It provides an accessible introduction to the history and contemporary debates of this important and often complex issue. Starting with a critical survey of the main historical attempts by Aristotle, Descartes, Spinoza, Locke and Hume to provide an analysis of substance, the authors present the view that a substance must satisfy an independence condition which could not be satisfied by an insubstantial entity. Throughout the book, the authors also consider problems for the notion of substance raised by the unity of the parts of organisms and explore the problem of how we can actually know what kinds of physical substance there are.