I can’t eat that because it is bad for me” or “That is a good food, so I can eat that anytime I want” are examples of the “good-food-bad-food trap.” They are common statements among the general public, and particularly dieters.
The good-food-bad-food trap is just as it sounds—dividing foods into different categories deemed either good to eat or bad to eat. Dieting and public health campaigns really reinforce this all-or-nothing thinking with a series of rules about what we should and should not be eating. While the intention behind this notion is good, it is actually quite problematic in practice.