A topic common to both Plato’s and Aristotle’s discussions of theories of the soul is the doctrine of the soul as a harmony of the parts of the body. Plato’s Phaedo as well as Aristotle’s De anima and Eudemus present this theory and argue against the identification of the soul as a harmony. This paper has two focuses, one philosophical and one historical. First, I will focus on the argumentation used by Aristotle in his dialogue Eudemus, which is often associated (...) with Aristotle’s early attachment to Plato. On the basis of the argumentation against the harmonia theory, I will try to show that the Eudemus is not a dialogue that depicts Aristotle’s Platonic phase. Instead, by comparing the arguments of the Eudemus with both Plato and Aristotle’s mature thought, I will argue that the argumentation of the Eudemus seems to be an indirect attack on Plato’s view on the Forms and on the nature of the soul, and that it seems to be consistent with Aristotle’s mature work On the Soul. Second, given that Aristotle discusses this topic twice, I will try, also on the basis of conclusions about the Eudemus and on later reception of Aristotle’s arguments, to show why this is the case. (shrink)

This dissertation is a collection of essays exploring the role of metaphor in Aristotle’s scientific method. Aristotle often appeals to metaphors in his scientific practice; but in the Posterior Analytics, he suggests that their use is inimical to science. Why, then, does he use them in natural science? And what does his use of metaphor in science reveal about the nature of his scientific investigations? I approach these questions by investigating the epistemic status of metaphor in Aristotelian science. In the (...) first essay, I defend an interpretation of metaphor as a type of heuristic reasoning: I claim that Aristotle uses metaphor to express conditions an explanation in natural science must meet if it is to explain regular, ordered change. These conditions specify the kinds of causes—particularly unmoved efficient causes—which the inquirer into nature is seeking. In the second essay, I look to Aristotle’s use of certain endoxa or common beliefs as explanatory principles in science, and show that his use of these principles is similar to his use of metaphor. In the final essay, I present a historical study of the analogy of art and nature, and I suggest that by looking to how the Greeks understood the role of inquiry in the arts, we can shed some light on Aristotle’s views concerning the method of inquiry he thinks the natural scientist should adopt. (shrink)

At Phaedo 74b–c an important argument is given for the non–identity of perceptible equals and equality. The argument is usually understood as an application of Leibniz’s Law in which the predicate appears unequal is affirmed of perceptible equals but not equality. But this reading requires explaining why the plural locution the equals themselves is initially used for equality, and why the additional predicate appears as inequality is denied of it. In this paper, an account of the equality premise is given (...) which allows for an initial grasp of equality as a plurality (suitably expressed by a plural locution), and introduces a generic predicate for appearance, appears its opposite (rightly denied of equality). The former ensures that the question of non–identity is not begged, while the latter secures a role for every element in the premise. So understood, the argument is both more robust and carefully formulated than is usually thought. (shrink)

John Mackie famously dismissed the rational tenability of moral objectivism with two quick arguments. The second, the so-called “argument from queerness,” proceeds as follows. A commitment to moral objectivism brings with it a commitment to the existence of moral properties as “queer” as Platonic Forms that are apprehended only through occult faculties like so-called “moral intuition” (Mackie 1977, 38). Since we have no reason to believe that there is any faculty such as moral intuition that serves as a reliable Form (...) detector, we equally have no reason to accept moral objectivism (1977, 23–24, 38–41). Recently, Julia Annas has observed that Mackie has offered us “a coarse and imperceptive interpretation of Plato,” in addition to a mistaken account of the epistemic requirements of moral objectivism (2001, 238). But one might worry that the case Annas makes for the homely nature of Platonic moral knowledge—it’s just like plumbing, only non-optional (2001, 246)—rests, as she admits, on her focus on dialogues like the Laches, in which the analogy between the moral virtues and crafts like flute-playing, shoe-making, and navigating is emphasized (2001, 244). Annas explicitly leaves open the question whether Mackie’s interpretation might capture Plato’s conception of moral knowledge in dialogues like the Republic, in which the analogy between moral and mathematical knowledge is emphasized (2001, 243). Yet it is clear from Mackie’s brief remarks about Plato that he has the Republic primarily in mind (Mackie 1977, 23–24). (shrink)