@vicgrinberg reminds me of the time in Technical Drawing class during my BSc the professor was correcting someone‘s work in front of the whole class, marking the transparent drawing paper with a red pen. The student, startled, not believing his eyes interrupted him: „I think you’re looking at it from the backside “

without even looking up or flipping the paper, he said in a monotone, calm, emotionless voice: „I know.“

We weren’t able to tell if he was lazy or just showing off