Hmm …

… BOOK REVIEW: 'Tell Your Children' by Alex Berenson - Washington Times.

But Mr. Berenson changed his thinking on the subject when his wife, Jacqueline, a Harvard and Columbia trained-psychiatrist who specializes in evaluating mentally ill criminals, told him that all the mentally ill criminals she evaluated smoked marijuana. She told her husband that all the big studies say this and that he should read them.

They probably also drank alcohol and did lots of other things that lots of people who are not in jail and not mentally ill do. Mrs. Berenson has committed the post hoc, ergo propter hoc fallacy (confusing sequence with causation). Another reason a course in classical logic is useful.