display all the ideas for this combination of texts
11 ideas
| 15290 | What reduces the field of the possible is a step towards necessity [Harré/Madden] |
| Full Idea: Whatever reduces the field of the possible is a step towards necessity. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 7.IV) | |
| A reaction: This is a deeply stirring idea, because it suddenly opens up a research project of narrowing the possibilities, with a stunning Holy Grail at the end of it. Sherlock Holmes said this first, of course. |
| 15291 | There is 'absolute' necessity (implied by all propositions) and 'relative' necessity (from what is given) [Harré/Madden] |
| Full Idea: In addition to absolute necessity ('p is strictly implied by ¬p'), i.e. p strictly implied by any proposition whatever, C.I. Lewis also distinguished relative necessity ('p implied by what is given or known'). | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 7.V) | |
| A reaction: Once you accept this distinction you find that the 'relative' one comes in all sorts of degrees. You "have to" put more salt in this soup. (Deontic' necessity, someone on Twitter tells me!) |
| 15230 | Logical necessity is grounded in the logical form of a statement [Harré/Madden] |
| Full Idea: When the logical form of a statement is offered as the grounds for the judgement that it cannot be true we have logical necessity. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 1.V.B) | |
| A reaction: This sounds like a truth about logical necessity, but certainly not a full account of it, because contingent statements also have logical form. I can't think of any other criterion than the finding of a contradiction buried in the logical form. |
| 15214 | Natural necessity is not logical necessity or empirical contingency in disguise [Harré/Madden] |
| Full Idea: Natural necessity is neither a mere reflection of logical necessity nor a roundabout way of referring to empirical contingency. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 1.I.B) | |
| A reaction: They offer a strong defence of natural necessity, which is basic to their scientific essentialism. The key point is that they, unlike some others, are not defending metaphysical necessity about nature, but finding a different type of necessity. Good. |
| 15221 | The relation between what a thing is and what it can do or undergo relate by natural necessity [Harré/Madden] |
| Full Idea: The relation between what a thing is and what it is capable of doing and undergoing is naturally necessary. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 1.II.C) | |
| A reaction: Note that this was written in 1975, and in no way rests of Kripkean notions of rigid designation and necessary identities. Needs thought, but I take it to be an appealing proposal. |
| 15224 | A necessity corresponds to the nature of the actual [Harré/Madden] |
| Full Idea: There is a necessity corresponding to the nature of the actual. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 1.III.C) | |
| A reaction: A nice slogan for the assertion of a genuine and distinct natural necessity. Hence every possible world will have its own distinctive natural necessity. If the actual contains the possible, then there are possible new natural necessities in the actual! |
| 15232 | Natural necessity is when powerful particulars must produce certain results in a situation [Harré/Madden] |
| Full Idea: When the natures of the operative powerful particulars, the constraining or stimulating effect of conditions and so on are offered as the grounds for the judgement that a certain effect cannot but happen (or fail), we have natural necessity. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 1.V.B) | |
| A reaction: This is the view I subscribe to, the really right bit of scientific essentialism. Can this view be proved? Hm. I take the opposite view to be the misguided Humean idea that if you can imagine it not happening, then it might not happen. Firey furnace. |
| 15288 | People doubt science because if it isn't logically necessary it seems to be absolutely contingent [Harré/Madden] |
| Full Idea: At the basis of all doubts about the rationality of science lies the idea that there is no rational resting place between logical necessity and absolute contingency. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 7.III) | |
| A reaction: I'm struck by the fact that when someone says "I have to go now", they express a necessity. Are there thousands of types of necessity, or one conditional necessity resting on thousands of different foundations? |
| 15289 | Property or event relations are naturally necessary if generated by essential mechanisms [Harré/Madden] |
| Full Idea: The relationship between co-existing properties or successive events or states is naturally necessary when understood by scientists to be related by generative mechanisms, whose structure and components constitute the essential natures of the world. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 7.III) | |
| A reaction: Does that mean that the relationship between an actual state and a possible state is metaphysically necessary, rather than naturally necessary? I think we need dispositions to be part of actuality, and hence replace 'co-existing' with 'possible'. |
| 15231 | Transcendental necessity is conditions of a world required for a rational being to know its nature [Harré/Madden] |
| Full Idea: When the conditions for a rational being having knowledge of the nature of a world are offered as the grounds for the judgement that such a world must have certain characteristics, we have transcendental necessity. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 1.V.B) | |
| A reaction: It seems like a rather hard call to decide whether such characteristics pertain to the world, or to the mind of the rational being. Kant is obviously behind this one. You must read his first Critique at least four times to evaluate it. |
| 15234 | There is a transcendental necessity for each logical necessity, but the transcendental extends further [Harré/Madden] |
| Full Idea: Whatever is logically necessary must be reflected in a corresponding transcendental necessity. But there are a great range of transcendental necessities which are not reflected in any logical necessity. | |
| From: Harré,R./Madden,E.H. (Causal Powers [1975], 1.V.C) | |
| A reaction: That is, the world would be unknowable if any of the logical necessities failed to apply to it. I hope that doesn't mean that we are supposed to intuitively know all the logical necessities. Nowadays we are famous for being bad at that. |