This joke is even listed as an example of a maths joke on wikipedia: https://en.m.wikipedia.org/wiki/Mathematical_joke#Stereotypes_of_mathematicians https://en

This joke is even listed as an example of a maths joke on wikipedia: https://en.m.wikipedia.org/wiki/Mathematical_joke#Stereotypes_of_mathematicians https://en.m.wikipedia.org/wiki/Mathematical_joke#Stereotype...