11 ideas
| 11211 | If a sound conclusion comes from two errors that cancel out, the path of the argument must matter [Rumfitt] |
| Full Idea: If a designated conclusion follows from the premisses, but the argument involves two howlers which cancel each other out, then the moral is that the path an argument takes from premisses to conclusion does matter to its logical evaluation. | |
| From: Ian Rumfitt ("Yes" and "No" [2000], II) | |
| A reaction: The drift of this is that our view of logic should be a little closer to the reasoning of ordinary language, and we should rely a little less on purely formal accounts. |
| 11210 | Standardly 'and' and 'but' are held to have the same sense by having the same truth table [Rumfitt] |
| Full Idea: If 'and' and 'but' really are alike in sense, in what might that likeness consist? Some philosophers of classical logic will reply that they share a sense by virtue of sharing a truth table. | |
| From: Ian Rumfitt ("Yes" and "No" [2000]) | |
| A reaction: This is the standard view which Rumfitt sets out to challenge. |
| 11212 | The sense of a connective comes from primitively obvious rules of inference [Rumfitt] |
| Full Idea: A connective will possess the sense that it has by virtue of its competent users' finding certain rules of inference involving it to be primitively obvious. | |
| From: Ian Rumfitt ("Yes" and "No" [2000], III) | |
| A reaction: Rumfitt cites Peacocke as endorsing this view, which characterises the logical connectives by their rules of usage rather than by their pure semantic value. |
| 14961 | Clearly a pipe can survive being taken apart [Cartwright,R] |
| Full Idea: There is at the moment a pipe on my desk. Its stem has been removed but it remains a pipe for all that; otherwise no pipe could survive a thorough cleaning. | |
| From: Richard Cartwright (Scattered Objects [1974], p.175) | |
| A reaction: To say that the pipe survives dismantling is not to say that it is fully a pipe during its dismantled phase. He gives a further example of a book in two volumes. |
| 14962 | Bodies don't becomes scattered by losing small or minor parts [Cartwright,R] |
| Full Idea: If a branch falls from a tree, the tree does not thereby become scattered, and a human body does not become scattered upon loss of a bit of fingernail. | |
| From: Richard Cartwright (Scattered Objects [1974], p.184) | |
| A reaction: This sort of observation draws me towards essentialism. A body is scattered if you divide it in a major way, but not if you separate off a minor part. It isn't just a matter of size, or even function. We have broader idea of what is essential. |
| 11214 | We learn 'not' along with affirmation, by learning to either affirm or deny a sentence [Rumfitt] |
| Full Idea: The standard view is that affirming not-A is more complex than affirming the atomic sentence A itself, with the latter determining its sense. But we could learn 'not' directly, by learning at once how to either affirm A or reject A. | |
| From: Ian Rumfitt ("Yes" and "No" [2000], IV) | |
| A reaction: [compressed] This seems fairly anti-Fregean in spirit, because it looks at the psychology of how we learn 'not' as a way of clarifying what we mean by it, rather than just looking at its logical behaviour (and thus giving it a secondary role). |
| 7257 | All modern social systems seem to be conspiracies of the rich [More,T] |
| Full Idea: When I consider any social system that prevails in the modern world, I can't see it as anything but a conspiracy of the rich to advance their own interests under the pretext of organizing society. | |
| From: Thomas More (Utopia [1516], Bk 2) | |
| A reaction: I'm afraid this is my own view of most conservative politics. I don't deny that there is a good case to be made for the conservative view (by Burke and Scruton, for example), but the rich will always latch onto its coat-tails. Cf. Idea 122. |
| 7254 | If you try to get elected, you should be permanently barred from seeking office [More,T] |
| Full Idea: In Utopia, anyone who deliberately tries to get himself elected to a public office is permanently disqualified from holding one. | |
| From: Thomas More (Utopia [1516], Bk 2) | |
| A reaction: This echoes a thought found in Plato (Idea 2149). I've always liked this idea. Why can't we have elections were a group of the best people are invited to stand? Well, yes, it would lead to corruption... Still, the best should be pushed to the front. |
| 7255 | Only Utopians fail to see glory in warfare [More,T] |
| Full Idea: Utopians are practically the only people on earth who fail to see anything glorious in war. | |
| From: Thomas More (Utopia [1516], Bk 2) | |
| A reaction: A refreshing thought for such an early date. Whatever dubious behaviour is nowadays attributed to Thomas More, you have to admire someone who writes this during the reign of Henry VIII. |
| 7253 | In Utopia, legal euthanasia is considered honourable [More,T] |
| Full Idea: In Utopia, officially sanctioned euthanasia is regarded as an honourable death. | |
| From: Thomas More (Utopia [1516], Bk 2) | |
| A reaction: A bit surprising coming from a writer who is now a Catholic martyr and saint. |
| 7256 | In Utopia, the Supreme Being is identical with Nature [More,T] |
| Full Idea: Everyone in Utopia agrees that the Supreme Being (which they call Mythras) is identical with Nature. | |
| From: Thomas More (Utopia [1516], Bk 2) | |
| A reaction: This sounds remarkably like full-blown Spinozean pantheism, though it should be interpreted with caution. It certainly seems to show that pantheism was a possibility in the minds of late medieval religious thinkers. |