Combining Texts

All the ideas for 'Issues of Pragmaticism', 'Letter to G.H. Schaller' and 'Investigations into Logical Deduction'

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3 ideas

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

13832

Natural deduction shows the heart of reasoning (and sequent calculus is just a tool) [Gentzen, by Hacking]

16. Persons / F. Free Will / 5. Against Free Will

4871	A thing is free if it acts only by the necessity of its own nature [Spinoza]

19. Language / A. Nature of Meaning / 1. Meaning

19087

The meaning or purport of a symbol is all the rational conduct it would lead to [Peirce]