query: Intuitionistic proof of $\neg\neg(\neg\neg P \rightarrow P)$
positive_passages.docid: 148237
positive_passages.text: Is ¬¬(¬¬P → P) provable in intuitionistic logic?
negative_passages.docid: 91947
negative_passages.text: Proof of $ f:I_n \rightarrow I_m \Rightarrow n = m$
negative_passages.docid: 20252
negative_passages.text: The Axiom of Choice and the Cartesian Product.
negative_passages.docid: 48368
negative_passages.text: Prove using Natural Deduction in predicate logic $(\forall x\ P(x))\to Q ⊢ \exists x (P(x)\to Q)$
negative_passages.docid: 88104
negative_passages.text: Prove "$(p \lor q) \land (\neg p \lor r)) \rightarrow (q \lor r)$" is a tautology
negative_passages.docid: 42150
negative_passages.text: Prove that $\forall x \neg P(x) \iff \neg \exists x P(x)$
negative_passages.docid: 93707
negative_passages.text: Formal proof for $q \land \neg q \vdash r \land \neg r$
negative_passages.docid: 3663
negative_passages.text: Finding counterexamples in elementary set theory.
negative_passages.docid: 103463
negative_passages.text: Mantel's Theorem proof verification
negative_passages.docid: 125174
negative_passages.text: Combinatorial intuition of identity
negative_passages.docid: 147947
negative_passages.text: Does double negation distribute over implication intuitionistically?
negative_passages.docid: 82739
negative_passages.text: Why is $\alpha \rightarrow \forall x(\alpha)$ not generally correct in first-order logic?
negative_passages.docid: 140868
negative_passages.text: Axiomatization of $\mathbb{Z}$ via well-ordering of positives.
negative_passages.docid: 151356
negative_passages.text: Need Hints Prove "$((\neg \alpha \to \alpha) \to \alpha) $" Using Axiom 1,2,3 and MP and deduction theorem
negative_passages.docid: 9282
negative_passages.text: Prove using natural deduction $((P \land Q) \rightarrow R) \vdash (P \rightarrow R) \lor (Q\rightarrow R)$
negative_passages.docid: 141952
negative_passages.text: Is there a decision procedure for intuitionistic propositional logic?
negative_passages.docid: 87955
negative_passages.text: How to prove that $P \rightarrow Q$ is equivalent with $\neg P \lor Q $?