My point is they aren't of any use if they are not representative. That's why I didn't use them.
They are representative though.

Obviously labradors are more commonly owned than Dobermans energize. Your statistic about labs being involved in more maimings just shows there are more labs, not that there are more maimings per 000 animals or anything useful like that.
He is just being deliberately obtuse

It wouldn't be the first time either.
