30 ideas
5300 | Philosophers have interpreted the world, but the point is to change it [Marx] |
17641 | Discoveries in mathematics can challenge philosophy, and offer it a new foundation [Russell] |
5297 | Whether human thinking can be 'true' must be decided in practice, not theory [Marx] |
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] |
192 | Only one thing can be contrary to something [Plato] |
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] |
190 | If asked whether justice itself is just or unjust, you would have to say that it is just [Plato] |
20185 | The most important things in life are wisdom and knowledge [Plato] |
20184 | The only real evil is loss of knowledge [Plato] |
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] |
191 | Everything resembles everything else up to a point [Plato] |
22598 | The authentic self exists at the level of class, rather than the individual [Marx, by Dunt] |
203 | Courage is knowing what should or shouldn't be feared [Plato] |
5298 | The human essence is not found in individuals but in social relations [Marx] |
202 | No one willingly and knowingly embraces evil [Plato] |
193 | Some things are good even though they are not beneficial to men [Plato] |
197 | Some pleasures are not good, and some pains are not evil [Plato] |
200 | People tend only to disapprove of pleasure if it leads to pain, or prevents future pleasure [Plato] |
188 | Socrates did not believe that virtue could be taught [Plato] |
204 | Socrates is contradicting himself in claiming virtue can't be taught, but that it is knowledge [Plato] |
189 | If we punish wrong-doers, it shows that we believe virtue can be taught [Plato] |
17633 | The law of gravity has many consequences beyond its grounding observations [Russell] |
5299 | Religious feeling is social in origin [Marx] |