What Emily said (emphasis mine):
In folks with addictions, the consumption of high quantities of “palatable” substances (or food) will result in an enhanced reinforcing value of the food and weakening of the control circuits.
The definition of a “palatable” food is anything you could eat when you are stuffed. Like Pringles. Or pie. Or kraft macaroni and cheese. Or ramen. Anything you can eat when you are stuffed should rarely be eaten. That may be the cardinal paleo rule.
Head over to Evolutionary Psychiatry to read the whole post. Lots of good stuff on the brain and obesity.