Assume the first two statements are true. Is the final one True, False, or Uncertain?
All lifeguards know how to swim. John knows how to swim. John is a lifeguard.

Question

Quizplus · Accepted Answer

While it is possible that John is a lifeguard, this cannot be accurately deduced from the first two statements. Even though John knows how to swim, not only lifeguards know to swim. Therefore, John could be a person who knows how to swim but is not a lifeguard. However, there is not any information that disproves John being a lifeguard. Therefore, the answer is Uncertain.

Assume the First Two Statements Are True