4 ideas
| 13832 | Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking] |
| 21995 | Must production determine superstructure, or could it be the other way round? [Singer on Marx] |
| 20577 | Even decently paid workers still have their produce bought with money stolen from them [Marx] |
| 9425 | Lewis later proposed the axioms at the intersection of the best theories (which may be few) [Mumford on Lewis] |