18 ideas
19066 | Philosophy aims to understand the world, through ordinary experience and science [Dummett] |
22764 | Ordinary speech is not exact about what is true; we say we are digging a well before the well exists [Sext.Empiricus] |
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] |
22762 | Some properties are inseparable from a thing, such as the length, breadth and depth of a body [Sext.Empiricus] |
21912 | Fichte, Schelling and Hegel rejected transcendental idealism [Lewis,PB] |
21911 | Fichte, Hegel and Schelling developed versions of Absolute Idealism [Lewis,PB] |
22759 | Fools, infants and madmen may speak truly, but do not know [Sext.Empiricus] |
22760 | Madmen are reliable reporters of what appears to them [Sext.Empiricus] |
19061 | An explanation is often a deduction, but that may well beg the question [Dummett] |
22763 | We can only dream of a winged man if we have experienced men and some winged thing [Sext.Empiricus] |
19064 | Holism is not a theory of meaning; it is the denial that a theory of meaning is possible [Dummett] |