33 ideas
9247 | Life will be lived better if it has no meaning [Camus] |
6707 | Suicide - whether life is worth living - is the one serious philosophical problem [Camus] |
9245 | To an absurd mind reason is useless, and there is nothing beyond reason [Camus] |
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] |
9244 | Logic is easy, but what about logic to the point of death? [Camus] |
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] |
9249 | Whether we are free is uninteresting; we can only experience our freedom [Camus] |
9253 | The human heart has a tiresome tendency to label as fate only what crushes it [Camus] |
9250 | Discussing ethics is pointless; moral people behave badly, and integrity doesn't need rules [Camus] |
9252 | The more one loves the stronger the absurd grows [Camus] |
467 | A virtue is a combination of intelligence, strength and luck [Ion] |
9251 | One can be virtuous through a whim [Camus] |
9243 | If we believe existence is absurd, this should dictate our conduct [Camus] |
6708 | Happiness and the absurd go together, each leading to the other [Camus] |
9242 | Essential problems either risk death, or intensify the passion of life [Camus] |
9246 | Danger and integrity are not in the leap of faith, but in remaining poised just before the leap [Camus] |
9248 | It is essential to die unreconciled and not of one's own free will [Camus] |