Combining Texts

All the ideas for 'On the Principles of Indiscernibles', 'Ethics: Inventing Right and Wrong' and 'Introduction to 'Hippias Minor''

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

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3 ideas

6. Mathematics / C. Sources of Mathematics / 10. Constructivism / b. Intuitionism

9548	A mathematical object exists if there is no contradiction in its definition [Waterfield]

22. Metaethics / A. Ethics Foundations / 1. Nature of Ethics / f. Ethical non-cognitivism

4761	The 'error theory' of morals says there is no moral knowledge, because there are no moral facts [Mackie, by Engel]

28. God / B. Proving God / 2. Proofs of Reason / a. Ontological Proof

2116	The concept of an existing thing must contain more than the concept of a non-existing thing [Leibniz]