What is the negation of a logical expression?
74546
Negating A Mathematical Statement
149035
Using "neither" without "nor"
11471
Ambiguity of “not.... because”
65379
Deriving $\neg R$ from $\{R↔(R∨(P∧¬P)), R↔¬P, ¬P→(P↔(Q→Q)), P→Q\}$
52322
Implication in mathematics - How can A imply B when A is False?
20658
Difficulty in finding a counterexample
56351
Prove that these statements $(A \lor \neg B)$ and $\neg A \to \neg B$ are logically equivalent
57267
Short circuit behavior of logical expressions in C in this example
119888
Is it possible to convert $\forall$ quantifiers to $\exists$ quantifiers without negation?
64194
Are =, , ==, !=, &&, and || used for arithmetic expressions or conditional expressions?
66697
English questions and negation with *do* in syntax
30733
Negation as failure in Prolog is a procedural behavior?
73231
Why in implication, if premise is false then implication is true?
32402
$(A \implies B) \implies (\neg B \implies \neg A)$?
93742
Show that the conditional statement is a tautology without using a truth table
85770
What is the difference between ∀x(p(x) →q(x)) and ∀x(p(x) ∧q(x))?
131761
Boolean expressions in Java