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Ideas for 'Material Beings', 'Sources of Knowledge of Mathematics' and 'Thought'

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9 ideas

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

3093	Any two states are logically linked, by being entailed by their conjunction [Harman]

5. Theory of Logic / A. Overview of Logic / 6. Classical Logic

3098	Deductive logic is the only logic there is [Harman]

5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens

3094	You don't have to accept the conclusion of a valid argument [Harman]

5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

17587

The 'Law' of Excluded Middle needs all propositions to be definitely true or definitely false [Inwagen]

5. Theory of Logic / E. Structures of Logic / 1. Logical Form

3080	Logical form is the part of a sentence structure which involves logical elements [Harman]

3081	A theory of truth in a language must involve a theory of logical form [Harman]

3084	Our underlying predicates represent words in the language, not universal concepts [Harman]

5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic

17558

Variables are just like pronouns; syntactic explanations get muddled over dummy letters [Inwagen]

5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / b. The Heap paradox ('Sorites')

17583

There are no heaps [Inwagen]