> Guessing the right answer in school was always acceptable. Just sitting silently always made the teacher upset. Yes. This was problematic. I remember my firs

> Guessing the right answer in school was always acceptable. Just sitting silently always made the teacher upset. Yes. This was problematic. I remember my first semester in grad school taking a (for me) tough course. On a midterm, I didn't know how to answer a question, and I thought it was disrespectful to pretend to solve the problem (random relevant equations I could think of) and waste the grader's time with it. The professor called me into his office and said "Look, I can't give you points if you write nothing. Next time, write something and you'll probably get some partial credit."