24 ideas
7786 | Propositional logic handles negation, disjunction, conjunction; predicate logic adds quantifiers, predicates, relations [Girle] |
7798 | There are three axiom schemas for propositional logic [Girle] |
7799 | Proposition logic has definitions for its three operators: or, and, and identical [Girle] |
7797 | Axiom systems of logic contain axioms, inference rules, and definitions of proof and theorems [Girle] |
7794 | There are seven modalities in S4, each with its negation [Girle] |
7793 | ◊p → □◊p is the hallmark of S5 [Girle] |
7795 | S5 has just six modalities, and all strings can be reduced to those [Girle] |
7787 | Possible worlds logics use true-in-a-world rather than true [Girle] |
7788 | Modal logic has four basic modal negation equivalences [Girle] |
7796 | Modal logics were studied in terms of axioms, but now possible worlds semantics is added [Girle] |
7789 | Necessary implication is called 'strict implication'; if successful, it is called 'entailment' [Girle] |
7790 | If an argument is invalid, a truth tree will indicate a counter-example [Girle] |
7800 | Analytic truths are divided into logically and conceptually necessary [Girle] |
7801 | Possibilities can be logical, theoretical, physical, economic or human [Girle] |
7792 | A world has 'access' to a world it generates, which is important in possible worlds semantics [Girle] |
19722 | We could know the evidence for our belief without knowing why it is such evidence [Mittag] |
19723 | Evidentialism can't explain that we accept knowledge claims if the evidence is forgotten [Mittag] |
19720 | Evidentialism concerns the evidence for the proposition, not for someone to believe it [Mittag] |
19721 | Coherence theories struggle with the role of experience [Mittag] |
22808 | Liberalism is minimal government, or individual rights, or equality [Avineri/De-Shalit] |
22803 | Can individualist theories justify an obligation to fight in a war? [Avineri/De-Shalit] |
22804 | Autonomy is better achieved within a community [Avineri/De-Shalit] |
22806 | Communitarians avoid oppression for the common good, by means of small mediating communities [Avineri/De-Shalit] |
22807 | If our values are given to us by society then we have no grounds to criticise them [Avineri/De-Shalit] |