32 ideas
10888 | Sets can be defined by 'enumeration', or by 'abstraction' (based on a property) [Zalabardo] |
10889 | The 'Cartesian Product' of two sets relates them by pairing every element with every element [Zalabardo] |
10890 | A 'partial ordering' is reflexive, antisymmetric and transitive [Zalabardo] |
10886 | Determinacy: an object is either in a set, or it isn't [Zalabardo] |
10887 | Specification: Determinate totals of objects always make a set [Zalabardo] |
10897 | A first-order 'sentence' is a formula with no free variables [Zalabardo] |
10893 | Γ |= φ for sentences if φ is true when all of Γ is true [Zalabardo] |
10899 | Γ |= φ if φ is true when all of Γ is true, for all structures and interpretations [Zalabardo] |
10896 | Propositional logic just needs ¬, and one of ∧, ∨ and → [Zalabardo] |
10898 | The semantics shows how truth values depend on instantiations of properties and relations [Zalabardo] |
10902 | We can do semantics by looking at given propositions, or by building new ones [Zalabardo] |
10892 | We make a truth assignment to T and F, which may be true and false, but merely differ from one another [Zalabardo] |
10895 | 'Logically true' (|= φ) is true for every truth-assignment [Zalabardo] |
10900 | Logically true sentences are true in all structures [Zalabardo] |
10894 | A sentence-set is 'satisfiable' if at least one truth-assignment makes them all true [Zalabardo] |
10901 | Some formulas are 'satisfiable' if there is a structure and interpretation that makes them true [Zalabardo] |
10903 | A structure models a sentence if it is true in the model, and a set of sentences if they are all true in the model [Zalabardo] |
10891 | If a set is defined by induction, then proof by induction can be applied to it [Zalabardo] |
23805 | Some explanations offer to explain a mystery by a greater mystery [Schulte] |
23806 | Naturalist accounts of representation must match the views of cognitive science [Schulte] |
23793 | On the whole, referential content is seen as broad, and sense content as narrow [Schulte] |
23796 | Naturalists must explain both representation, and what is represented [Schulte] |
23792 | Phenomenal and representational character may have links, or even be united [Schulte] |
23795 | Naturalistic accounts of content cannot rely on primitive mental or normative notions [Schulte] |
23804 | Maybe we can explain mental content in terms of phenomenal properties [Schulte] |
23802 | Conceptual role semantics says content is determined by cognitive role [Schulte] |
23797 | Cause won't explain content, because one cause can produce several contents [Schulte] |
23799 | Teleosemantics explains content in terms of successful and unsuccessful functioning [Schulte] |
23800 | Teleosemantic explanations say content is the causal result of naturally selected functions [Schulte] |
23798 | Information theories say content is information, such as smoke making fire probable [Schulte] |
13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |