“...Pippi, can you tell me what seven and five are?”
Pippie, astonished and dismayed, looked at [the teacher] and said, “Well, if you don't know that yourself, you needn't think I'm going to tell you.”
All the children stared in horror at Pippi, and the teacher explained that one couldn’t answer that way in school.
“I beg your pardon,” said Pippi contritely. “I didn't know that. I won't do it again.”
“No, let us hope not,” said the teacher. “And now I will tell you that seven and five are twelve.”