Combining Texts

All the ideas for 'The Sign of Four', 'Internal and External Reasons' and 'Reply to Fifth Objections'

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7 ideas

9. Objects / B. Unity of Objects / 2. Substance / a. Substance
Knowing the attributes is enough to reveal a substance [Descartes]
12. Knowledge Sources / A. A Priori Knowledge / 3. Innate Knowledge / a. Innate knowledge
Our thinking about external things doesn't disprove the existence of innate ideas [Descartes]
14. Science / C. Induction / 1. Induction
If you eliminate the impossible, the truth will remain, even if it is weird [Conan Doyle]
18. Thought / D. Concepts / 2. Origin of Concepts / c. Nativist concepts
A blind man may still contain the idea of colour [Descartes]
20. Action / C. Motives for Action / 3. Acting on Reason / c. Reasons as causes
Reasons are 'internal' if they give a person a motive to act, but 'external' otherwise [Williams,B]
28. God / B. Proving God / 2. Proofs of Reason / a. Ontological Proof
Possible existence is a perfection in the idea of a triangle [Descartes]
Necessary existence is a property which is uniquely part of God's essence [Descartes]