Recently, in one discussion, a major physicist said that a real physicist, if he is an honest person, would have trouble answering questions such as: what is entropy, field, spin, or, say, quantum confusion. However, any scientist who is cuddled in Wikipedia and hardened in scratches on the internet, without a whisper and with a sting, will indulgencely scratch the answer to any of these questions with one spirit.
And someone illustrated this point of view with this story:
The English physicist Joseph Thomson once asked a student at an exam, "What is an electron?" The student began to yell and scream, “You know, Professor, I knew, but I forgot...” Thomson grabbed him for his chest and started shouting, “How dare you forget this? You were the only one who knew it!”