17 ideas
| 5300 | Philosophers have interpreted the world, but the point is to change it [Marx] |
| 14782 | Philosophy is an experimental science, resting on common experience [Peirce] |
| 5297 | Whether human thinking can be 'true' must be decided in practice, not theory [Marx] |
| 14787 | Self-contradiction doesn't reveal impossibility; it is inductive impossibility which reveals self-contradiction [Peirce] |
| 14783 | Logic, unlike mathematics, is not hypothetical; it asserts categorical ends from hypothetical means [Peirce] |
| 14788 | Mathematics is close to logic, but is even more abstract [Peirce] |
| 10580 | Mathematics is both necessary and a priori because it really consists of logical truths [Yablo] |
| 10579 | Putting numbers in quantifiable position (rather than many quantifiers) makes expression easier [Yablo] |
| 10577 | Concrete objects have few essential properties, but properties of abstractions are mostly essential [Yablo] |
| 10578 | We are thought to know concreta a posteriori, and many abstracta a priori [Yablo] |
| 14786 | Some logical possibility concerns single propositions, but there is also compatibility between propositions [Peirce] |
| 14789 | Experience is indeed our only source of knowledge, provided we include inner experience [Peirce] |
| 14785 | The world is one of experience, but experiences are always located among our ideas [Peirce] |
| 22598 | The authentic self exists at the level of class, rather than the individual [Marx, by Dunt] |
| 14784 | Ethics is the science of aims [Peirce] |
| 5298 | The human essence is not found in individuals but in social relations [Marx] |
| 5299 | Religious feeling is social in origin [Marx] |