I agree with this one. For example, I was visiting my parents a while back...and my Mom ordered a Float for desert. She thought the float tasted a bit off and wondered if they'd mistakingly made it with Diet Soda or such. I tasted a spoonfull and quickly ascertained that it was made with the regular stuff.

I did not consider that a cheat, because the amount consumed was rather small and there were almost no carbs in that tiny amount. Of course, the amount needed to qualify as a cheat varies by the food. Even a spoon's worth of pixie stick dust [pure desxtrose (powdered glucose)] would be a cheat.