What made Mr Keesing allow Anne to talk in class?

Explanation

Anne was able to justify her talkative nature every time she was punished by Mr. Keesing. On three occasions, as punishment, he gave her topics to write essays on. However, on each occasion he was impressed by the manner in which she presented her arguments. Finally, Mr. Keesing accepted the fact that Anne would always be that way. Hence, she was allowed to talk in class.