21 ideas
| 17641 | Discoveries in mathematics can challenge philosophy, and offer it a new foundation [Russell] |
| 17638 | If one proposition is deduced from another, they are more certain together than alone [Russell] |
| 17632 | Non-contradiction was learned from instances, and then found to be indubitable [Russell] |
| 17629 | Which premises are ultimate varies with context [Russell] |
| 17630 | The sources of a proof are the reasons why we believe its conclusion [Russell] |
| 17640 | Finding the axioms may be the only route to some new results [Russell] |
| 17627 | It seems absurd to prove 2+2=4, where the conclusion is more certain than premises [Russell] |
| 17628 | Arithmetic was probably inferred from relationships between physical objects [Russell] |
| 17637 | The most obvious beliefs are not infallible, as other obvious beliefs may conflict [Russell] |
| 17639 | Believing a whole science is more than believing each of its propositions [Russell] |
| 17631 | Induction is inferring premises from consequences [Russell] |
| 20937 | The state should produce higher civilisations for all, in tune with the economic apparatus [Gramsci] |
| 20935 | Eventually political parties lose touch with the class they represent, which is dangerous [Gramsci] |
| 20936 | Caesarism emerges when two forces in society are paralysed in conflict [Gramsci] |
| 20941 | Totalitarian parties cut their members off from other cultural organisations [Gramsci] |
| 20939 | What is the function of a parliament? Does it even constitute a part of the State structure? [Gramsci] |
| 20938 | Liberalism's weakness is its powerful rigid bureaucracy [Gramsci] |
| 20940 | Perfect political equality requires economic equality [Gramsci] |
| 13304 | Learned men gain more in one day than others do in a lifetime [Posidonius] |
| 17633 | The law of gravity has many consequences beyond its grounding observations [Russell] |
| 20820 | Time is an interval of motion, or the measure of speed [Posidonius, by Stobaeus] |