Prove the following or provide a counter-example if the claim is false.
141424
$\log_7 n$ is either an integer or an irrational number
10598
Contrapositive Fitch Proof
15721
"Is it proved that ...?" vs. "Has it been proven that ...?"
45481
Prove or disprove validity: $(\forall x \exists y (P(x) \supset Q(y))) \supset(\exists y \forall x (P (x) \supset Q(y)))$
120517
Is it possible to prove that a particular statement cannot be disproved without creating a contradiction?
75529
Series prove or disprove statement
121720
Given ∃x.¬p(x), use the Fitch System to prove ¬∀x.p(x).
140590
Claim the superiority of a treatment in the context of a significant difference with a two-sided test
15873
What fallacy dismisses a conclusion because supporters give invalid arguments for it?
150041
T must be contravariantly valid
129185
Understanding the truth value for ⇏ when antecedent is false and consequent is true.
144129
Is it okay to dispute the premise of a question?
100399
A doubt with a part of a certain proof.
77859
Prove or find a counter example to the claim that for all sets A,B,C if A ∩ B = B ∩ C = A ∩ C = Ø then A∩B∩C ≠ Ø
20658
Difficulty in finding a counterexample
43700
Are proofs by contradiction really logical?
12186
How does predicate logic handle contradictory statements about something that does not exist?