Combining Texts

All the ideas for 'Necessary Existents', 'Rules for the Direction of the Mind' and 'On 'Generation and Corruption''

expand these ideas     |    start again     |     specify just one area for these texts

---

3 ideas

11. Knowledge Aims / B. Certain Knowledge / 1. Certainty

9807	In pursuing truth, anything less certain than mathematics is a waste of time [Descartes]

12. Knowledge Sources / B. Perception / 2. Qualities in Perception / d. Secondary qualities

16721

Changes in secondary qualities are caused by changes in primary qualities [Giles of Orleans]

19. Language / D. Propositions / 3. Concrete Propositions

19216

Propositions (such as 'that dog is barking') only exist if their items exist [Williamson]