5 ideas
18491 | The idea of 'making' can be mere conceptual explanation (like 'because') [Künne] |
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] |
7492 | Early societies are based on community, and modern societies on association [Tönnies, by Watson] |