As a student of behavioral psychology, I have spent a lot of time learning to understand and capitalize on the behaviors of the people I deal with. One of the tools that has really helped me is learning the subtle cues of when a person is lying to me. It has served me well in business, life, and especially relationships.
It may be wise to not judge a book by its cover, but it is human nature to do just that. And extremely fast.
Low Fat Foods DON'T WORK!
You cannot lose fat eating processed Low Fat Diet foods. While it's true that fat has more calories per gram, most low fat foods are full of carbs, and not just any carbs, but high glycemic index carbs. Do you know what all carbs turn into in the body? Sugar. Would you eat a 1 pound bag of sugar and expect to drop fat?