Inconsistency of one statement implies every statement is true?
135957
Why in an inconsistent axiom system every statement is true? (For Dummies)
150882
If $\Gamma \cup \{ \neg \varphi \}$ is inconsistent, then $\Gamma \vdash \varphi$
75600
Is Gödel's modified liar an illogical statement?
61489
Is there a statement whose undecidability is undecidable?
40048
Finding the fallacy in this broken proof
105303
'Obvious' theorems that are actually false
155679
If union of two theories is not consistent one of them implies a sentence which the other implies opposite of it
48615
Does the assertion that every two cardinalities are comparable imply the axiom of choice?
106342
Why $L$-structures cannot satisfy a contradiction
157490
Statements equivalent to the Axiom of Choice
139278
If $\Gamma$ is satisfiable then $\Gamma$ is consistent
83778
An incorrect proof by exhaustion
52322
Implication in mathematics - How can A imply B when A is False?
39138
Is this idiom pythonic? (someBool and "True Result" or "False Result")
121605
A coin tossing game which leads to a contradiction
128332
Counterexample to "Measurable in each variable separately implies measurable"
109685
An invalid argument, the conclusion of which is a tautology