#equivalence

Timed test

6 questions · 6 min · score and explanations at the end

Q 1 / 6Score 0 / 0

Shuffle questions

Which of these pairs of sentences are logically equivalent (same truth value on every valuation)? Select all that apply.

$A \to B$ and $\lnot B \to \lnot A$ 1
$\lnot(A \to B)$ and $\lnot A \to \lnot B$ 2
$A \lor B$ and $\lnot A \to B$ 3
$(A \to B) \to C$ and $A \to (B \to C)$ 4
$(A \leftrightarrow B) \leftrightarrow C$ and $A \leftrightarrow (B \leftrightarrow C)$ 5

Keys: 1–9 select · Enter check / next