On Substance Being the Same As Its Essence in Metaphysics Z 6: The Pale Man Argument

Journal of the History of Philosophy 37 (1):1-27 (1999)
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In lieu of an abstract, here is a brief excerpt of the content:On Substance Being the Same As Its Essence in Metaphysics Z 6: The Pale Man ArgumentNorman O. Dahlin general Aristotle’s account of substance in the Categories is clear. Primary substances, the basic constitutents of the world, are independently existing individuals, paradigm examples of which are particular living organisms. However, the later use to which Aristotle puts matter and form provides him with two new candidates for primary substance.1 A reconsideration of substance is in order, and Aristotle begins it in Metaphysics Z. The status of matter soon becomes clear. It can’t be substance because it isn’t a “this” and separate (Z 3, 1029a26–28). The status of form, however, is another story. Aristotle argues in Z 6 that substances are the same as their essences. While the evidence isn’t unequivocal, Z 4, 10, 11, and 15 take essence to be form, where form is universal. Z 13, however, argues that no universal is substance. Aristotle thus appears caught in an inconsistency. Substance is universal form because it is the same as universal form; however, no universal is substance. This and other problems have led to as wide a variety of interpretations of Metaphysics Z as one will find of any philosophical text. Virtually all of them end up attributing to Aristotle one of [End Page 1] three views about substance—substances are universal forms, particular forms, or composites of matter and form.2This paper takes a first step in a project that promises to remove the above inconsistency while allowing but not requiring Aristotle to take concrete particular substances (composite substances involving both matter and form) to be substances. The project looks at the first of the three claims that lead to the above apparent inconsistency and asks whether the sameness relation in it should be understood as identity or a weaker relation that could hold between concrete particular substances and their universal essences. It is the latter possibility that promises to avoid the above contradiction. If concrete particular substances can be the same as their universal essences, then the essences of substances can be universals without necessarily turning substances into universals. Nevertheless, granting this possibility wouldn’t require Aristotle to take concrete particular substances to be substances. Forms of concrete particular substances will also be the same as their essences in this weaker sameness relation, and considerations other than those at work in Z 6 could still lead Aristotle to rule out concrete individuals as substances.1Although Aristotle has standardly been interpreted as arguing in Z 6 that substances are identical with their essences,3 two considerations allow the question of this paper to be raised. [End Page 2]The first is the variety of uses to which Aristotle puts such notions as the same (tauto) or one (hen). Aristotle’s concern in Z 6 is with whether certain things are or are not the same (tauto), one (hen), or one and the same (hen kai auto and to auto kai hen) as their essences.4 He argues that kata sumbebēkos legomena (things said to be what they are with respect to an accident) are not the same as their essences, but that kath’ hauta legomena (things said to be what they are with respect to themselves), a class of things that includes substances,5 are the same as their essences. However, when Aristotle says that one thing and another are the same or one, there is more than one kind of claim he can be making. Some of them apply to things that are identical; others do not.For example, things can be the same in number, species, and genus. A doublet and a cloak are the same in number, a man and another man are the same in species, and a man and a horse are the same in genus.6 Although a doublet and a cloak are identical, a man and another man, and a man and a horse, are not.Things can also be accidentally the same, or the same in definition, substance, or essence,7 where these two ways of being the same cut across the previous ways of being the same. For example...

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Norman Dahl
University of Minnesota

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