Can you post a link? I'm honestly under the suspicious you just posted a PDF you did not read, or knowingly knew did not back up your arguments but hoped no one would read the 25 pages to find out.
Damn, guess I was wrong. Still nothing to do with the parents argument though, you should at edit your comment to include that link so people understand what you're taking about.
He was wrong and/or misleading about everything he said in this article. Maybe you should apply the same suspicion to someone like Sowell instead.