That I believe applies to automotive products "sold" on BS claims that simply defy logic.
Re: "I agree but think there is one additional element in this. After 6 months or a year of developing an idea, the human brain wants the idea to work so much that it many times convinces the designer that it works, even with evidence it does not. You see the same thing in lots of the customers, after spending $100 plus they convince themselves it works rather than to realize it was a mistake. This is why you see so many positive testimonials and people convinced it works."
