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7. Existence / C. Structure of Existence / 5. Supervenience / b. Types of supervenience

[distinguishing different forms of supervenience]

9 ideas
Users of 'supervenience' blur its causal and constitutive meanings [Searle]
     Full Idea: I am no fan of the concept of supervenience. Its uncritical use is a sign of philosophical confusion, because the concept oscillates between causal supervenience and constitutive supervenience.
     From: John Searle (Rationality in Action [2001], Ch.9 n5)
     A reaction: I don't see why you shouldn't assert the supervenience of one thing on another, while saying that you are not sure whether it is causal or constitutive. The confusion seems to me to be in understandings of the causal version.
Mereological supervenience says wholes are fixed by parts [Kim]
     Full Idea: Mereological supervenience is the doctrine that wholes are fixed by the properties and relations that characterise their parts.
     From: Jaegwon Kim (Mind in a Physical World [1998], §1 p.018)
     A reaction: Presumably this would be the opposite of 'holism'. Personally I would take mereological supervenience to be not merely correct, but to be metaphysically necessary. Don't ask me to prove it, of course.
Where pixels make up a picture, supervenience is reduction [Lewis]
     Full Idea: In the case of millions of pixels making up a picture on a computer screen, the supervenience is reduction.
     From: David Lewis (Lewis: reduction of mind (on himself) [1994], p.414)
     A reaction: Since 'supervenience' seems a suspect relationship about which no one is clear, this is a point very much worth making.
'Superdupervenience' is supervenience that has a robustly materialistic explanation [Horgan,T]
     Full Idea: The idea of a ontological supervenience that is robustly explainable in a materialistically explainable way I hereby dub 'superdupervenience'.
     From: Terence Horgan (From Supervenience to Superdupervenience [1993], §4)
     A reaction: [He credits William Lycan with the actual word] His assumption prior to this introduction is that mere supervenience just adds a new mystery. I take supervenience to be an observation of 'tracking', which presumably needs to be explained.
'Global' supervenience is facts tracking varying physical facts in every possible world [Horgan,T]
     Full Idea: The idea of 'global supervenience' is standardly expressed as 'there are no two physically possible worlds which are exactly alike in all physical respects but different in some other respect'.
     From: Terence Horgan (From Supervenience to Superdupervenience [1993], §5)
     A reaction: [Jaegwon Kim is the source of this concept] The 'local' view will be that they do indeed track, but they could, in principle, come apart. A zombie might be a case of them possibly coming apart. Zombies are silly.
Logical supervenience is when one set of properties must be accompanied by another set [Chalmers]
     Full Idea: B-properties logically supervene on A-properties if no two logically possible situations are identical with respect to their A-properties but distinct with respect to their B-properties.
     From: David J.Chalmers (The Conscious Mind [1996], 1.2.1)
     A reaction: This is the gap into which Chalmers wants to slip zombies. He's wrong. He thinks that because he can imagine Bs without As, that this makes their separation logically possible. No doubt he can imagine a bonfire on the moon.
Natural supervenience is when one set of properties is always accompanied by another set [Chalmers]
     Full Idea: B-properties supervene naturally on A-properties if any two naturally possible situations with the same A-properties have the same B-properties.
     From: David J.Chalmers (The Conscious Mind [1996], 1.2.1)
     A reaction: Since it is hard to imagine a healthy working brain failing to produce consciousness, given the current laws of nature, almost everyone (except extreme dualists) must concede that they are naturally supervenient. I wonder why they are.
Supervenience can add covariation, upward dependence, and nomological connection [Hanna]
     Full Idea: 'Strong supervenience' involves necessary covariation of the properties, and upward dependence of higher level on lower level. ...If we add a nomological connection between the two, then we have 'superdupervenience'.
     From: Robert Hanna (Rationality and Logic [2006], 1.2)
     A reaction: [compressed] Very helpful. A superdupervenient relationship between mind and brain would be rather baffling if they were not essentially the same thing. (which is what I take them to be).
Weak supervenience is in one world, strong supervenience in all possible worlds [Bennett,K]
     Full Idea: Weak supervenience says there is no possible world that contains individuals that are B-indiscernible but A-discernible. Strong supervenience entails the same even if they are in different possible worlds.
     From: Karen Bennett (Supervenience [2011], §4.1)
     A reaction: In other words (I presume), in simple language, the weak version says they happen supervene, the strong version says they have to supervene.