14 ideas
11022 | Gentzen introduced a natural deduction calculus (NK) in 1934 [Gentzen, by Read] |
11065 | The inferential role of a logical constant constitutes its meaning [Gentzen, by Hanna] |
11023 | The logical connectives are 'defined' by their introduction rules [Gentzen] |
11213 | Each logical symbol has an 'introduction' rule to define it, and hence an 'elimination' rule [Gentzen] |
10067 | Gentzen proved the consistency of arithmetic from assumptions beyond arithmetic [Gentzen, by Musgrave] |
12583 | Belief truth-conditions are normal circumstances where the belief is supposed to occur [Papineau] |
5303 | For the proletariate, law, morality and religion are just expressions of bourgeois interests [Marx/Engels] |
21998 | Bourgeois interests create our morality, law and religion [Marx/Engels] |
5302 | Modern governments are just bourgeois management committees [Marx/Engels] |
5304 | Communism aims to abolish not all property, but bourgeois property [Marx/Engels] |
5307 | Many of the bourgeois rights grievances are a form of self-defence [Marx/Engels] |
5306 | The free development of each should be the condition for the free development of all [Marx/Engels] |
5305 | Communists want to rescue education from the ruling class [Marx/Engels] |
5301 | The history of all existing society is the history of class struggles [Marx/Engels] |