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All the ideas for '', 'What is an Emotion?' and 'Explanation in Mathematics'

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6 ideas

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

11211

If a sound conclusion comes from two errors that cancel out, the path of the argument must matter [Rumfitt]

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

11210

Standardly 'and' and 'but' are held to have the same sense by having the same truth table [Rumfitt]

11212

The sense of a connective comes from primitively obvious rules of inference [Rumfitt]

9. Objects / D. Essence of Objects / 7. Essence and Necessity / b. Essence not necessities

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Essences are no use in mathematics, if all mathematical truths are necessary [Mancosu]

18. Thought / A. Modes of Thought / 3. Emotions / a. Nature of emotions

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Rage is inconceivable without bodily responses; so there are no disembodied emotions [James]

19. Language / F. Communication / 3. Denial

11214

We learn 'not' along with affirmation, by learning to either affirm or deny a sentence [Rumfitt]