[WillPostForFood]

You are making the same semantic argument I was criticizing. In the context of this discussion we aren't talking about the literal measure of energy, but the package. I.e., is a quantity of sugar that has a calorie of energy the same to the body as a quantity of fat or fiber that contains a calorie of energy. That's what someone is claiming when they say a calorie is a calorie. And to that question, the evidence bears out that it the effects are not just psychological, and don't just affect desire to eat. If you took two twins, and fed one 2000 calories of cane sugar a day, and fed the other 2000 calories of raw broccoli, after a month, they wouldn't have the same weight.