not even celery.
Often part of the way the "math" is deceptively worked out is using calories for the math of "burning," and counting kilocalories for the food.
See the calorie we think of is, not actually a single calorie, but rather a unit of 1000 calories or a kilocalorie. Many countries actually write "kilocalories" on the nutrition label, but in the USA (and I'm not sure if anywhere else) the label usually is labeled as "calories."
So, if you talk about small calories for burning, and large calories for eating, you can make it seem like you can actually compensate for high calorie food with negative calorie food.
There are other ways to twist the math, but this is one way.
