21 ideas
19066 | Philosophy aims to understand the world, through ordinary experience and science [Dummett] |
19067 | A successful proof requires recognition of truth at every step [Dummett] |
19060 | Truth-tables are dubious in some cases, and may be a bad way to explain connective meaning [Dummett] |
11066 | Deduction is justified by the semantics of its metalanguage [Dummett, by Hanna] |
19058 | Syntactic consequence is positive, for validity; semantic version is negative, with counterexamples [Dummett] |
19063 | Beth trees show semantics for intuitionistic logic, in terms of how truth has been established [Dummett] |
19059 | In standard views you could replace 'true' and 'false' with mere 0 and 1 [Dummett] |
19062 | Classical two-valued semantics implies that meaning is grasped through truth-conditions [Dummett] |
19065 | Soundness and completeness proofs test the theory of meaning, rather than the logic theory [Dummett] |
18284 | Particulars can be verified or falsified, but general statements can only be falsified (conclusively) [Popper] |
19061 | An explanation is often a deduction, but that may well beg the question [Dummett] |
19064 | Holism is not a theory of meaning; it is the denial that a theory of meaning is possible [Dummett] |
23429 | The environment needs localised politics, with its care for the land [Dobson] |
23424 | An ideology judges things now, and offers an ideal, with a strategy for reaching it [Dobson] |
23426 | Ecologism is often non-liberal, by claiming to know other people's best interests [Dobson] |
23427 | Socialism can be productive and centralised, or less productive and decentralised [Dobson] |
23428 | Difference feminists say women differ fundamentally from men [Dobson] |
23422 | For the environment, affluence and technology matter as much as population size [Dobson] |
23425 | Ecologism says growth must be reduced, and efficiency is not enough [Dobson] |
23430 | A million years is a proper unit of political time [Dobson] |
23423 | We currently value the present fourteen times more highly than the future [Dobson] |