Proven/proved interchangeable?
15721
"Is it proved that ...?" vs. "Has it been proven that ...?"
131257
$\to$ vs. $\vdash$ in logic
136584
Understanding connection between terms tautology, contradiction, contingent, satisfiable, unsatisfiable, valid and invalid
157490
Statements equivalent to the Axiom of Choice
53612
Same solution implying row equivalence?
22584
Can we prove that a statement cannot be proved?
135
Difference between "Show" and "Prove"
68607
Could an argument with false Premises and a true Conclusion be logically valid?
87312
Using 'is' or 'was' when something is still true
56325
If we accept a false statement, can we prove anything?
62936
Proving equivalencies of two versions of the Axiom of Choice
48761
How can know if a proof technique can actually prove something? Specifically, induction
19326
What makes induction a valid proof technique?
107087
Each vs. Either
113065
Proving equivalences of statements equivalent to AC
119888
Is it possible to convert $\forall$ quantifiers to $\exists$ quantifiers without negation?
66711
Neutral alternative to "deny" to mean "assert the untruth [of a claim]"