Imagine someone asks you what you have learned in your logic class and what you found to be the most useful information you learned there
2 answers
Obviously your answer is that you've learned nothing in this class. If you'd learned anything, you wouldn't have posted this question here.
I am really curious why on all of these sites so many people act like such smart #$$#@ regarding this question. It's a serious question, and it was a very difficult class for many people. Such a waste of time to read such ridiculous answers to such a serious question.