#double-turnstile

Timed test

1 question · 1 min · score and explanations at the end

Q 1 / 1Score 0 / 0

Shuffle questions

True or false: for any sentences $P$ and $Q$ , if $P \not\models Q$ ( $P$ does not entail $Q$ ), then $P \models \lnot Q$ .

Keys: 1–9 select · Enter check / next