Combining Texts
Ideas for
'Lectures 1930-32 (student notes)', 'Philosophy of Mathematics' and 'Phil of Mathematics: why nothing works'
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9 ideas
5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic
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18724
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In logic nothing is hidden [Wittgenstein]
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5. Theory of Logic / C. Ontology of Logic / 4. Logic by Convention
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18709
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Laws of logic are like laws of chess - if you change them, it's just a different game [Wittgenstein]
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5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
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9605
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If a proposition is false, then its negation is true [Brown,JR]
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5. Theory of Logic / D. Assumptions for Logic / 3. Contradiction
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18736
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Contradiction is between two rules, not between rule and reality [Wittgenstein]
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not
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18723
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We may correctly use 'not' without making the rule explicit [Wittgenstein]
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / d. and
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18718
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Saying 'and' has meaning is just saying it works in a sentence [Wittgenstein]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / a. Names
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18727
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A person's name doesn't mean their body; bodies don't sit down, and their existence can be denied [Wittgenstein]
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5. Theory of Logic / K. Features of Logics / 1. Axiomatisation
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9649
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Axioms are either self-evident, or stipulations, or fallible attempts [Brown,JR]
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5. Theory of Logic / L. Paradox / 4. Paradoxes in Logic / c. Berry's paradox
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9638
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Berry's Paradox finds a contradiction in the naming of huge numbers [Brown,JR]
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