People wake up because of nightmares. If one wakes up because of 1 nightmare out of 10, we can claim that if someone never woke up because of nightmares, he never had ≈any nightmare.
People wake up because of nightmares. If one wakes up because of 1 nightmare out of 10, we can claim that if someone never woke up because of nightmares, he never had ≈any nightmare.