And, it is contradicted just a few paragraphs later. Sugar (and fat once it has been broken down) is burned. The statement becomes much more sensible (and les

And, it is contradicted just a few paragraphs later. Sugar (and fat once it has been broken down) is burned. The statement becomes much more sensible (and less of a straw man) if we say "mass is burned". Works for steam engines. Works for people.