on the contrary

"You can't prove a negative."
- Donald Rumsfeld, who routinely dumbfounded the White House Press Corps with this claim.

Counter argument here.

education for advertising

"Eighty-seven American universities offer undergraduate courses in advertising, and some even give degrees in it. With a few conspicuous exceptions, the teachers lack the practical experience to be relevant. All of them are handicapped by the poor quality of the textbooks, and very few do research of their own. Most of their graduates get jobs with small agencies, the big agencies preferring to recruit people who have furnished their minds by studying history, languages, economics and so forth... schools of business administration alumni are more remarkable for stodginess and arrogance than imagination."
- David Ogilvy, Ogilvy on Advertising, p.39

or ever

"You should not be arrogant by something you didn't create."
- Bono