21 ideas
| 3972 | Truth and objectivity depend on a community of speakers to interpret what they mean [Davidson] |
| Full Idea: The basis on which the concepts of truth and objectivity depend for application is a community of understanding, agreement among speakers on how each is to be understood. | |
| From: Donald Davidson (Davidson on himself [1994], p.233) | |
| A reaction: Obviously all understanding is, in practice, an interpretation by a community, but that isn't what 'truth' means. We mean 'true independently of any community'. |
| 3969 | There are no ultimate standards of rationality, since we only assess others by our own standard [Davidson] |
| Full Idea: It makes no sense to speak of comparing or agreeing on ultimate standards of rationality, since it is our own standards in each case to which we must turn in interpreting others. This is not a failure of objectivity, but where 'questions come to an end'. | |
| From: Donald Davidson (Davidson on himself [1994], p.232) | |
| A reaction: This seems wrong, given the commitment to truth and charity in interpretation. He could have said the same about perception, but I doubt if he would. |
| 13831 | Logic is based on transitions between sentences [Prawitz] |
| Full Idea: I agree entirely with Dummett that the right way to answer the question 'what is logic?' is to consider transitions between sentences. | |
| From: Dag Prawitz (Gentzen's Analysis of First-Order Proofs [1974], §04) | |
| A reaction: I always protest at this point that reliance on sentences is speciesism against animals, who are thereby debarred from reasoning. See the wonderful Idea 1875 of Chrysippus. Hacking's basic suggestion seems right. Transition between thoughts. |
| 13825 | Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz] |
| Full Idea: With Gentzen's natural deduction, we may say that the introductions represent, as it were, the 'definitions' of the logical constants. The introductions are not literally understood as 'definitions'. | |
| From: Dag Prawitz (Gentzen's Analysis of First-Order Proofs [1974], 2.2.2) | |
| A reaction: [Hacking, in 'What is Logic? §9' says Gentzen had the idea that his rules actually define the constants; not sure if Prawitz and Hacking are disagreeing] |
| 13823 | In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz] |
| Full Idea: In Gentzen's natural deduction, the inferences are broken down into atomic steps in such a way that each step involves only one logical constant. The steps are the introduction or elimination of the logical constants. | |
| From: Dag Prawitz (Gentzen's Analysis of First-Order Proofs [1974], 1.1) |
| 3960 | There are no such things as minds, but people have mental properties [Davidson] |
| Full Idea: There are no such things as minds, but people have mental properties. | |
| From: Donald Davidson (Davidson on himself [1994], p.231) | |
| A reaction: I think this is right. It fits with Searle's notion of consciousness as a property, like the liquidity of water. I don't panic if I think "I have no mind, but I have extraordinary properties". |
| 3964 | If the mind is an anomaly, this makes reduction of the mental to the physical impossible [Davidson] |
| Full Idea: If there are no strict psychophysical laws, this rules out reductionism, either by definition of mental predicates in physical terms, or by way of bridging laws. | |
| From: Donald Davidson (Davidson on himself [1994], p.231) | |
| A reaction: But it is by no means clear that there are no psycho-physical laws. How could this be known a priori? |
| 3961 | Obviously all mental events are causally related to physical events [Davidson] |
| Full Idea: All mental events are causally related to physical events. ..This seems obvious. | |
| From: Donald Davidson (Davidson on himself [1994], p.231) | |
| A reaction: All mental events are physically caused. Some bodily physical events result from mental events. Probably all mental events have some effect of other mental events (all of which are in some sense physical). |
| 3963 | There are no strict psychophysical laws connecting mental and physical events [Davidson] |
| Full Idea: There are no strict psychophysical laws (that is, laws connecting mental events under their mental descriptions with physical events under their physical descriptions). | |
| From: Donald Davidson (Davidson on himself [1994], p.231) | |
| A reaction: This is clearly open to question. It may be just that no human mind could ever grasp such laws, given their probable complexity. |
| 3965 | Mental entities do not add to the physical furniture of the world [Davidson] |
| Full Idea: Mental entities do not add to the physical furniture of the world. | |
| From: Donald Davidson (Davidson on himself [1994], p.231) | |
| A reaction: This seems to me clearly true, however we propose to characterise mental events. |
| 3966 | The correct conclusion is ontological monism combined with conceptual dualism [Davidson] |
| Full Idea: My basic premises lead to the conclusion of ontological monism coupled with conceptual dualism (like Spinoza, except that he denied mental causation). | |
| From: Donald Davidson (Davidson on himself [1994], p.231) | |
| A reaction: 'Conceptual dualism' implies no real difference, but 'property dualism' is better, suggesting different properties when viewed from different angles. |
| 7518 | If folk psychology gives a network of causal laws, that fits neatly with functionalism [Churchland,PM] |
| Full Idea: The portrait of folk psychology as a network of causal laws dovetailed neatly with the emerging philosophy of mind called functionalism. | |
| From: Paul M. Churchland (Folk Psychology [1996], II) | |
| A reaction: And from the lower levels functionalism is supported by the notion that the brain is modular. Note the word 'laws'; this implies an underlying precision in folk psychology, which is then easily attacked. Maybe the network is too complex for simple laws. |
| 7519 | Many mental phenomena are totally unexplained by folk psychology [Churchland,PM] |
| Full Idea: Folk psychology fails utterly to explain a considerable variety of central psychological phenomena: mental illness, sleep, creativity, memory, intelligence differences, and many forms of learning, to cite just a few. | |
| From: Paul M. Churchland (Folk Psychology [1996], III) | |
| A reaction: If folk psychology is a theory, it will have been developed to predict behaviour, rather than as a full-blown psychological map. The odd thing is that some people seem to be very bad at folk psychology. |
| 7520 | Folk psychology never makes any progress, and is marginalised by modern science [Churchland,PM] |
| Full Idea: Folk psychology has not progressed significantly in the last 2500 years; if anything, it has been steadily in retreat during this period; it does not integrate with modern science, and its emerging wallflower status bodes ill for its future. | |
| From: Paul M. Churchland (Folk Psychology [1996], III) | |
| A reaction: [compressed] However, while shares in alchemy and astrology have totally collapsed, folk psychology shows not the slightest sign of going away, and it is unclear how it ever could. See Idea 3177. |
| 3967 | Absence of all rationality would be absence of thought [Davidson] |
| Full Idea: To imagine a totally irrational animal is to imagine an animal without thought. | |
| From: Donald Davidson (Davidson on himself [1994], p.232) | |
| A reaction: This wouldn't be so clear without the theory of evolution, which suggests that only the finders of truth last long enough to breed. |
| 3974 | Our meanings are partly fixed by events of which we may be ignorant [Davidson] |
| Full Idea: What we mean by what we say is partly fixed by events of which we may be ignorant. | |
| From: Donald Davidson (Davidson on himself [1994], p.235) | |
| A reaction: There is 'strict and literal meaning', which is fixed by the words, even if I don't know what I am saying. But 'speaker's meaning' is surely a pure matter of a state of mind? |
| 3968 | Propositions explain nothing without an explanation of how sentences manage to name them [Davidson] |
| Full Idea: The idea of a proposition is unhelpful, until it is explained how exactly the words in the contained sentence manage to name or describe a proposition (which even Frege failed to achieve). | |
| From: Donald Davidson (Davidson on himself [1994], p.232) | |
| A reaction: It seems obvious to me that there are brain events best labelled as propositions, even if their fit with language is puzzling. |
| 3970 | Thought is only fully developed if we communicate with others [Davidson] |
| Full Idea: We would have no fully-fledge thoughts if we were not in communication with others. | |
| From: Donald Davidson (Davidson on himself [1994], p.233) | |
| A reaction: This seems a plausible empirical observation, though I would doubt any a priori proof of it. If animals could speak, they would become intellectuals? |
| 3971 | There is simply no alternative to the 'principle of charity' in interpreting what others do [Davidson] |
| Full Idea: The 'principle of charity' is a misleading term, since there is no alternative if we want to make sense of the attitudes and actions of the agents around us. | |
| From: Donald Davidson (Davidson on himself [1994], p.233) | |
| A reaction: I suppose so, but only with a background of evolutionary theory. I would necessarily assume charity if a robot spoke to me. |
| 3973 | Without a teacher, the concept of 'getting things right or wrong' is meaningless [Davidson] |
| Full Idea: Without a 'teacher', nothing would give content to the idea that there is a difference between getting things right and getting them wrong. | |
| From: Donald Davidson (Davidson on himself [1994], p.234) | |
| A reaction: Seems right. A group of speculators with no one in the role of 'teacher' would seem to be paralysed with uncertain (except where judgements are very obvious). |
| 3962 | Cause and effect relations between events must follow strict laws [Davidson] |
| Full Idea: If two events are related as cause and effect, there is a strict law under which they may be subsumed. | |
| From: Donald Davidson (Davidson on himself [1994], p.231) | |
| A reaction: Davidson admits that this is open to challenge (though Hume and Kant supported it). It does seem to be central to our understanding of nature. |