8 ideas
13831 | Logic is based on transitions between sentences [Prawitz] |
13825 | Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz] |
13823 | In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz] |
22258 | Passion for progress is always short-lived [Sandel] |
22259 | Conservatives are either individualistic, or communal [Sandel] |
22260 | Modern liberalism fails to articulate a vision of the common good [Sandel] |
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] |