Handout

Instructions: Translate the following into TL. Then, using the pattern recognition method, assess for validity. Lastly, identify the relevant valid argument form or formal fallacy.

  1. If there is no reliable way to tell that you are dreaming, you can’t be sure you’re not dreaming right now. There is no reliable way to tell you’re dreaming. Therefore, you can’t be sure you’re not dreaming right now.
  2. If you never read your textbooks, you should stop buying them. I stopped buying them. So it must be that I didn’t read them.
  3. Either you’re the teacher or you’re a student. It is not the case that you’re a student. So you must be the teacher.
  4. If God exists, then there would be no unnecessary suffering. But it is not the case that there is no unnecessary suffering. Therefore, God does not exist.
  5. It’s not possible that both RCG is dating Shakira and Piqué is married to Shakira. RCG is dating Shakira. So Piqué is not married to Shakira. ;)