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Weird points about validity of argument

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#logic #propositional-calculus #first-order-logic #formal-languages #paradoxes
118
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proving [${\phi,\phi\to\psi}⊢\neg(\phi\to\neg\psi)$)] only with axioms

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#propositional-calculus
52
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Is $¬r→q = r \vee q$?

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#propositional-calculus
61
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Rewrite this argument in PL form

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#logic #propositional-calculus #logic-translation
503
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$\vdash \neg\alpha\rightarrow(\alpha\rightarrow\beta)$ without deduction theorem

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#logic #propositional-calculus
53
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proving a claim using structural induction

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#discrete-mathematics #logic #propositional-calculus
320
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Ambiguous sentence propositional logic interoperation

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#logic #propositional-calculus
60
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Logical expressivity and model classes

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#logic #propositional-calculus #model-theory #formal-languages
1k
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Issue proving that a formula is valid using semantic tableau

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#logic #computer-science #propositional-calculus
138
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Logical ambiguity formula for "I have not had one of them"

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#logic #propositional-calculus #first-order-logic #logic-translation
72
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Discrete Mathematics question regarding Propostional Logic

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#discrete-mathematics #logic #computer-science #propositional-calculus
101
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Logic - Building formulas with conjunction and disjunction

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#logic #propositional-calculus
680
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How is the material conditional treated in Natural Deduction?

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#logic #propositional-calculus
73
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What is the truth table for $p \Rightarrow q\land r$?

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#logic #propositional-calculus
87
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theoretical question regarding deduction and relation between $\vdash$ and $\vDash$

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#logic #propositional-calculus #hilbert-calculus

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