Combining Texts

All the ideas for 'Ethics: Inventing Right and Wrong', 'Gentzen's Analysis of First-Order Proofs' and 'How to Make our Ideas Clear'

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

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8 ideas

3. Truth / E. Pragmatic Truth / 1. Pragmatic Truth

7661	Truth is the opinion fated to be ultimately agreed by all investigators [Peirce]

5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic

13831

Logic is based on transitions between sentences [Prawitz]

5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / a. Logical connectives

13825

Natural deduction introduction rules may represent 'definitions' of logical connectives [Prawitz]

5. Theory of Logic / H. Proof Systems / 4. Natural Deduction

13823

In natural deduction, inferences are atomic steps involving just one logical constant [Prawitz]

11. Knowledge Aims / A. Knowledge / 2. Understanding

19089

Our whole conception of an object is its possible practical consequences [Peirce]

11. Knowledge Aims / A. Knowledge / 4. Belief / b. Elements of beliefs

7660	We are aware of beliefs, they appease our doubts, and they are rules of action, or habits [Peirce]

19. Language / A. Nature of Meaning / 5. Meaning as Verification

14906

Non-positivist verificationism says only take a hypothesis seriously if it is scientifically based and testable [Ladyman/Ross on Peirce]

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]