Earlier quoted context omitted.
Actually, it happens to be true that all eleven-year-olds attending wizarding school read preprints of theoretical computer science papers.
Then you did a very unrealistic job representing each and every other young wizard in your writing.
There are no 11 year olds who attend wizarding school, hence it is True that all such creatures read CS preprints. (Like it is True that unicorns have one horn.)