query: Use the Fitch system to prove the tautology (p ∨ ¬p). Stalled for days
positive_passages.docid: 143627
positive_passages.text: Use the Fitch system to prove the tautology (p ∨ ¬p)
negative_passages.docid: 155679
negative_passages.text: If union of two theories is not consistent one of them implies a sentence which the other implies opposite of it
negative_passages.docid: 6490
negative_passages.text: Help with null hypothesis
negative_passages.docid: 143248
negative_passages.text: What approach should I take to establish this logical proof?
negative_passages.docid: 143999
negative_passages.text: Prove that formula is not tautology.
negative_passages.docid: 83778
negative_passages.text: An incorrect proof by exhaustion
negative_passages.docid: 5293
negative_passages.text: Show that the logic $ \ \forall x \exists y \ P(x,y) \ $ is not logically equivalent to $ \ \exists x \forall y \ P(x,y) \ $
negative_passages.docid: 136427
negative_passages.text: Given $∃y.∀x.p(x,y)$, use the Fitch system to prove $∀x.∃y.p(x,y)$
negative_passages.docid: 68265
negative_passages.text: Why is it sensical for a proposition with a false antecedent to validate to true?
negative_passages.docid: 64075
negative_passages.text: Prove that a set of connectives is inadequate
negative_passages.docid: 48606
negative_passages.text: Help with a Predicate Logic homework proof
negative_passages.docid: 93410
negative_passages.text: How to prove ~ (~P & ~Q) : P ∨ Q by natural deduction
negative_passages.docid: 141814
negative_passages.text: Proofs using theorems instead of axioms
negative_passages.docid: 10598
negative_passages.text: Contrapositive Fitch Proof
negative_passages.docid: 57215
negative_passages.text: Stuck on formal proofs. Not sure how to continue
negative_passages.docid: 47222
negative_passages.text: Soundness of a rule of a proof system with respect to the truth tables?
negative_passages.docid: 4769
negative_passages.text: Any reasons why the basis case can't be at the end of a mathematical induction proof?