9 ideas
15148 | Powers give explanations, without being necessary for some class membership [Chakravartty] |
Full Idea: Powers explain behaviours regardless of whether they are necessary for membership in a particular class of things. | |
From: Anjan Chakravarrty (Inessential Aristotle: Powers without Essences [2012], 3) | |
A reaction: This seems right, and is important for driving a wedge between powers and essences. If there are essences, they are not simply some bunch of powers. |
16629 | By comparing qualities and features, reason can gradually infer the nature of substance [Grosseteste] |
Full Idea: Awakened reason distinguishes color from size and shape from body and then shape and size from the substance of body, and so by drawing distinctions and abstracting, it arrives at a grasp of the substance of body, which supports size, shape and color. | |
From: Robert Grosseteste (Commentary on 'Posterior Analytics' [1226], I.14), quoted by Robert Pasnau - Metaphysical Themes 1274-1671 07.4 | |
A reaction: This optimistic view influenced Aquinas, and is called 'incrementalism' by Pasnau. It is the spirit of scientific essentialism, and a nice instance of inference to the best explanation (though 'substance' in itself explains virtually nothing). |
15145 | A kind essence is the necessary and sufficient properties for membership of a class [Chakravartty] |
Full Idea: The modern concept of a kind essence is a set of intrinsic properties that are individually necessary and jointly sufficient for the membership of something in a class of things, or 'kind'. | |
From: Anjan Chakravarrty (Inessential Aristotle: Powers without Essences [2012], 2) | |
A reaction: I am always struck by the problem that the kind itself is constructed from the individuals, so circularity always seems to loom. |
15147 | Cluster kinds are explained simply by sharing some properties, not by an 'essence' [Chakravartty] |
Full Idea: The fact that members of some cluster kinds are subjects of causal generalizations reflects the degree to which they share causally efficacious properties, not the fact that they may be composed of essence kinds per se. | |
From: Anjan Chakravarrty (Inessential Aristotle: Powers without Essences [2012], 2) | |
A reaction: I think this is right. I am a fan of individual essences, but not of kind essences. I take kinds, and kind explanations, to be straightforward inductive generalisations from individuals. Extreme stabilities give the illusion of a kind essence. |
15144 | Explanation of causal phenomena concerns essential kinds - but also lack of them [Chakravartty] |
Full Idea: Scientific practices such as prediction and explanation regarding causal phenomena are concerned not merely with kinds having essences, but also with kinds lacking them. | |
From: Anjan Chakravarrty (Inessential Aristotle: Powers without Essences [2012], 1) | |
A reaction: Not quite clear what he has in mind, but explanation should certainly involve a coherent picture, and not just the citation of some underlying causal mechanism. |
15146 | Some kinds, such as electrons, have essences, but 'cluster kinds' do not [Chakravartty] |
Full Idea: Many of the kinds we theorize about and experiment on today simply do not have essences. We can distinguish 'essence kinds', such as electrons, and 'cluster kinds', such as biological species. | |
From: Anjan Chakravarrty (Inessential Aristotle: Powers without Essences [2012], 2) | |
A reaction: This is an important point for essentialists. He offers a strict criterion, in Idea 15145, for mind membership, but we might allow species to have essences by just relaxing the criteria a bit, and acknowledging some vagueness, especially over time. |
15151 | Many causal laws do not refer to kinds, but only to properties [Chakravartty] |
Full Idea: Causal laws often do not make reference to kinds of objects at all, but rather summarize relations between quantitative, causally efficacious properties of objects. | |
From: Anjan Chakravarrty (Inessential Aristotle: Powers without Essences [2012], 3) | |
A reaction: This would only be a serious challenge if it was not possible to translate talk of properties into talk of kinds, and vice versa. |
16713 | Philosophers are the forefathers of heretics [Tertullian] |
Full Idea: Philosophers are the forefathers of heretics. | |
From: Tertullian (works [c.200]), quoted by Robert Pasnau - Metaphysical Themes 1274-1671 20.2 |
6610 | I believe because it is absurd [Tertullian] |
Full Idea: I believe because it is absurd ('Credo quia absurdum est'). | |
From: Tertullian (works [c.200]), quoted by Robert Fogelin - Walking the Tightrope of Reason n4.2 | |
A reaction: This seems to be a rather desperate remark, in response to what must have been rather good hostile arguments. No one would abandon the support of reason if it was easy to acquire. You can't deny its engaging romantic defiance, though. |