It's human nature to pay more attention to the negative. Fear is one of our greatest motivators and people can exploit it to their gain. If I tell you that you are attractive, charming, tall, handsome, clumsy, strong and smart, which one feature do you pay the most attention to? Clumsy because it is negative. So when bucco list 10 negative things and 9 are proven wrong people still think to themselves,"Maybe he's right on that one thing?"