Yeah, but if she's getting so hungry that she fails, then in a sense, the rules failed. I lost the weight and kept it off because I was hungry less often, and could make better choices even when I broke the rules. A chunk of brisket meant I could go several hours without eating. Some strange person might find rice keeps them full for hours- in which case I'd abandon my low carb jihadism and tell them to stick with the rice (though add nutritionally dense stuff like oysters, liver, etc...).