| 11043 | It is not possible for fire to be cold or snow black [Aristotle] |
| Full Idea: It is not possible for fire to be cold or snow black. | |
| From: Aristotle (Categories [c.331 BCE], 12b01) |
| 15966 | Boyle and Locke believed corpuscular structures necessitate their powers of interaction [Locke, by Alexander,P] |
| Full Idea: Both Boyle and Locke believe in necessary connections in nature; full knowledge of a corpuscular structure would enable us to deduce, without trial, particular powers of interaction. | |
| From: report of John Locke (Essay Conc Human Understanding (2nd Ed) [1694]) by Peter Alexander - Ideas, Qualities and Corpuscles 03.3 | |
| A reaction: I take this view to be correct. Is the necessity analytic, because that is how you define the 'structures'? If not, what is the basis for the claim? |
| 15984 | The corpuscular hypothesis is the best explanation of the necessary connection and co-existence of powers [Locke] |
| Full Idea: Human understanding is scarce able to substitute better than the corpuscularian hypothesis in an explication of the qualities of bodies, which will afford us a fuller and clearer discovery of the necessary connection and co-existence of the powers. | |
| From: John Locke (Essay Conc Human Understanding (2nd Ed) [1694], 4.03.16) | |
| A reaction: [considerably reworded] Locke is committed to natural necessities, in a way entirely rejected by Hume. The picture given in this remark perfectly embodies scientific essentialism, though elsewhere Locke is more cautious. |
| 15950 | We will only understand substance when we know the necessary connections between powers and qualities [Locke] |
| Full Idea: Which ever hypothesis be clearest and truest, ...our knowledge concerning corporeal substances, will be very little advanced.. , till we are made see, what qualities and powers of bodies have a necessary connection or repugnancy one with another. | |
| From: John Locke (Essay Conc Human Understanding (2nd Ed) [1694], 4.03.16) | |
| A reaction: A part from the emphasis on powers, this sounds a bit like Armstrong's account, that laws are the necessary connections between properties. It is scientific essentialism because Locke expects researchers to discover this stuff. |
| 19669 | For Kant the laws must be necessary, because contingency would destroy representation [Kant, by Meillassoux] |
| Full Idea: Kant considers the hypothesis of the contingency of the laws of nature to be refuted by the mere fact of representation. ...If representation were no longer structured by causality, it would no longer structure any aspect of the phenomenon at all. | |
| From: report of Immanuel Kant (Critique of Pure Reason [1781]) by Quentin Meillassoux - After Finitude; the necessity of contingency 4 | |
| A reaction: This is based on the belief that a contingent nature would continually change, which Meillassoux denies. |
| 19672 | Kant fails to prove the necessity of laws, because his reasoning about chance is over-ambitious [Meillassoux on Kant] |
| Full Idea: Kant's belief in the necessity of laws is revoked as an instance of aleatory reason's unwarranted pretension to reach beyond the limits of experience. | |
| From: comment on Immanuel Kant (Critique of Pure Reason [1781]) by Quentin Meillassoux - After Finitude; the necessity of contingency 4 | |
| A reaction: A glimpse of Meillassoux's master argument. He cites Cantor on the uncountable transfinite, claiming that chance in nature involves the transfinite, but normal reasoning about chances should be restricted to what is countable. |
| 8933 | Science confronts the inner necessities of objects [Hegel] |
| Full Idea: Scientific cognition demands surrender to the life of the object, or, what amounts to the same thing, confronting and expressing its inner necessity. | |
| From: Georg W.F.Hegel (Phenomenology of Spirit [1807], Pref 53) | |
| A reaction: This strikes me as being a much better account of what science tries to do than all the modern talk about laws and theories. |
| 5818 | If water is H2O in the actual world, there is no possible world where it isn't H2O [Putnam] |
| Full Idea: Once we have discovered that water (in the actual world) is H2O, nothing counts as a possible world in which water isn't H2O. | |
| From: Hilary Putnam (Meaning and Reference [1973], p.159) | |
| A reaction: Presumably there could be a possible world in which water is a bit cloudy, so the fact that it is H2O is being judged as essential. Presumably the scientists in the possible world might discover that we are wrong about the chemistry of water? |
| 5464 | For essentialists, laws of nature are metaphysically necessary, being based on essences of natural kinds [Ellis] |
| Full Idea: Essentialist believe the laws of nature are metaphysically necessary, because anything that belongs to a natural kind is logically required (or is necessarily disposed) to behave as its essential properties dictate. | |
| From: Brian Ellis (The Philosophy of Nature: new essentialism [2002], Ch.4) | |
| A reaction: What a thrillingly large claim. Best approached with caution.. If we say 'essences make laws, and essences are necessary', we might wonder whether a natural kind essence could be SLIGHTLY different (a counterpart) in another world. |
| 13603 | A primary aim of science is to show the limits of the possible [Ellis] |
| Full Idea: Scientific essentialists hold that one of the primary aims of science is to define the limits of the possible. | |
| From: Brian Ellis (Scientific Essentialism [2001], 7.06) | |
| A reaction: I like this. It breaks down into the study of modal profiles, and it can work for abstracta as well as for the physical world. It even covers the study of character, and you could say that it is the subject matter of Jane Austen. |
| 8560 | If causal laws describe causal potentialities, the same laws govern properties in all possible worlds [Shoemaker] |
| Full Idea: To the extent that causal laws can be viewed as propositions describing the causal potentialities of properties, it is impossible that the same properties should be governed by different causal laws in different possible worlds. | |
| From: Sydney Shoemaker (Causality and Properties [1980], §08) | |
| A reaction: [He has just asserted that causal potentialities are essential to properties] This is the dramatic basic claim of scientific essentialism, which grows out of Shoemaker's causal account of properties. Note that the laws are just descriptions. |
| 15763 | If properties are causal, then causal necessity is a species of logical necessity [Shoemaker] |
| Full Idea: My theory of properties as causal appears to have the consequence that causal laws are logically necessary, and that causal necessity is just a species of logical necessity. | |
| From: Sydney Shoemaker (Causality and Properties [1980], §09) | |
| A reaction: Where he writes 'logical' necessity I would claim that he really means 'metaphysical' necessity. The point, I take it, is that given the existence of those properties, certain causal efforts must always follow from them. I agree. |
| 8561 | If a world has different causal laws, it must have different properties [Shoemaker] |
| Full Idea: If there are worlds in which the causal laws are different from those that prevail in this world, ..then the properties will have to be different as well. | |
| From: Sydney Shoemaker (Causality and Properties [1980], §09) | |
| A reaction: The next question is whether the same stuff (e.g. gold or water) could have different properties, and I take the the scientific essentialism answer to be 'no'. So the actual stuff (substances?) would have to be different. |
| 9387 | The scientific discovery (if correct) that gold has atomic number 79 is a necessary truth [Kripke] |
| Full Idea: Scientific discoveries about what gold is are not contingent truths, but are necessary truths in the strictest possible sense. ..If scientists are right, then it will be necessary and not contingent that gold be an element with atomic number 79. | |
| From: Saul A. Kripke (Naming and Necessity lectures [1970], Lecture 3) | |
| A reaction: I think this glorious and controversial claim is correct. It is hard to find supporting arguments, but the picture of nature that emerges (where the essences of the stuffs precede the laws of their behaviour) seems to me far more coherent. |
| 17054 | Scientific discoveries about gold are necessary truths [Kripke] |
| Full Idea: Statement representing scientific discoveries about what this stuff (gold) is are not contingent truths but necessary truths in the strictest possible sense. | |
| From: Saul A. Kripke (Naming and Necessity lectures [1970], Lecture 3) | |
| A reaction: People take him to mean 'metaphysically necessary' here. How do we distinguish the 'scientific' discoveries, which are necessary, from the more casual discoveries, which may not be? Presumably being yellow is also necessary? |
| 17057 | Once we've found that heat is molecular motion, then that's what it is, in all possible worlds [Kripke] |
| Full Idea: We have discovered a phenomenon (heat) which in all possible worlds will be molecular motion - which could not have failed to be molecular motion, because that's what the phenomenon is. | |
| From: Saul A. Kripke (Naming and Necessity lectures [1970], Lecture 3) | |
| A reaction: He refers to the identification as an 'essential property' of the phenomenon (and not merely a necessity). For my taste, Kripke uses the word 'property' too widely. |
| 15223 | Necessary effects will follow from some general theory specifying powers and structure of a world [Harré/Madden] |
| Full Idea: Given some general theory specifying the fundamental causal powers and thereby laying down the general lineaments of a world, the necessity of certain effects can be inferred. They will be 'hypothetically necessary' (given those powers). | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 1.III.B) | |
| A reaction: This is a pretty good statement of the core idea of necessity at the heart of scientific essentialism. Are we to call this 'natural' necessity or 'metaphysical' necessity? Presumably it is 'relative' necessity. Big implications for induction! |
| 15241 | Humeans say there is no necessity in causation, because denying an effect is never self-contradictory [Harré/Madden] |
| Full Idea: Humeans say there can be no element of necessity in the causal relation because the conjunction of a description of a cause with the negation of a description of its usual effect is never self-contradictory. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 3.I) | |
| A reaction: We might say there actually is a contradiction, because you assert the existence of something, and then deny that existence by denying that the effect could occur. If the object is inert this is wrong, but if it is defined by its powers it is right. |
| 11957 | It is contingent which kinds and powers exist in the world [Molnar] |
| Full Idea: It is a contingent matter that the world contains the exact natural kinds it does, and hence it is a contingent matter that it contains the very powers it does. | |
| From: George Molnar (Powers [1998], 10.3) | |
| A reaction: I take this to be correct (for all we know). It would be daft to claim that the regularities of the universe are necessarily that way, but it is not daft to say that the stuff of the universe necessitates the pattern of what happens. |
| 14345 | The necessity of an electron being an electron is conceptual, and won't ground necessary laws [Mumford] |
| Full Idea: The logical necessity of physical laws is not required by dispositional essentialism. An electron would not be an electron if its behaviour were different from the behaviour it has in the actual world, but this necessity is purely conceptual. | |
| From: Stephen Mumford (Dispositions [1998], 10.8) | |
| A reaction: [He is particularly aiming this at Ellis and Lierse 1994] This may be missing the point. Given those electron dispositions, the electrons necessitate law-like happenings. Whether a variable entity is called an 'electron' is trivial. |
| 9506 | Salt necessarily dissolves in water, because of the law which makes the existence of salt possible [Bird] |
| Full Idea: We cannot have a world where it is true both that salt exists (which requires Coulomb's Law to be true), and that it fails to dissolve in water (which requires Coulomb's Law to be false). So the dissolving is necessary even if the Law is contingent. | |
| From: Alexander Bird (Nature's Metaphysics [2007], 8.2) | |
| A reaction: Excellent. It is just like the bonfire on the Moon (imaginable through ignorance, but impossible). People who assert that the solubility of salt is contingent tend not to know much about chemistry. |
| 19667 | If the laws of nature are contingent, shouldn't we already have noticed it? [Meillassoux] |
| Full Idea: The standard objection is that if the laws of nature were actually contingent, we would already have noticed it. | |
| From: Quentin Meillassoux (After Finitude; the necessity of contingency [2006], 4) | |
| A reaction: Meillassoux offers a sustained argument that the laws of nature are necessarily contingent. In Idea 19660 he distinguishes contingencies that must change from those that merely could change. |
| 19670 | Why are contingent laws of nature stable? [Meillassoux] |
| Full Idea: We must ask how we are to explain the manifest stability of physical laws, given that we take these to be contingent? | |
| From: Quentin Meillassoux (After Finitude; the necessity of contingency [2006], 4) | |
| A reaction: Meissalloux offers a very deep and subtle answer to this question... It is based on the possibilities of chaos being an uncountable infinity... It is a very nice question, which physicists might be able to answer, without help from philosophy. |
| 14548 | There may be necessitation in the world, but causation does not supply it [Mumford/Anjum] |
| Full Idea: Causation is consistent with there being necessitation in the world, but we claim that causation does not itself provide that necessitation. | |
| From: S.Mumford/R.Lill Anjum (Getting Causes from Powers [2011], 3.8) | |
| A reaction: Interesting. One might distinguish between causation being necessary, and causation supplying the necessity. The obvious alternative is that essences supply the necessity. |
| 16977 | If essence is modal and laws are necessary, essentialist knowledge is found by scientists [Tahko] |
| Full Idea: If essence is conceived in terms of modality and the laws of nature are metaphysically necessary, it seems that the laws of nature constitute essentialist knowledge, so the discovery of essences is mostly due to scientists. | |
| From: Tuomas E. Tahko (The Epistemology of Essence (draft) [2013], 2.1) | |
| A reaction: This seems muddled to me. The idea that the laws themselves are essences is way off target. No one thinks all knowledge of necessities is essentialist. Mumford, for example, doesn't even believe in laws. |
| 19038 | Dispositional essentialism allows laws to be different, but only if the supporting properties differ [Vetter] |
| Full Idea: Even on the dispositional essentialist view the world might have been governed by different laws, if those laws involved different properties. What is excluded is the possibility of different laws involving the same properties as our actual laws. | |
| From: Barbara Vetter (Potentiality [2015], 7.8) | |
| A reaction: Important. Critics of dispositional essentialism accuse it of promoting the idea that the laws of nature are necessary, a claim for which we obviously have no evidence. I prefer to say they are necessary given that 'stuff', rather than those properties. |