"My sister said she was the only smart one in the class."
"What about the teacher you learn *from*?"
"My sister said she was the only smart one in the class."
"What about the teacher you learn *from*?"
Listen up, buttercup! This joke is easy peasy. So, the sister thinks she is smart because she is in the class, and then they say what about the teacher? Is the teacher not smart because she teaches all the little dummies?