As for your "Poppycock" reply, you are saying here yourself on 18/11/14 "Simple formula for weight adjustment is eat less to get lighter or eat more to get heavier. It's the same for adults, children, dogs cats or even hamsters."
Let's see what I can get off your thousands of old posts. Every time a person posts, they leave a little trail of character traits that pigeonhole them.
I note you didn't disagree with any of the character summary above. Every time you come in to attack I get to see a bit more of the jigsaw.
Ah. There's an interesting one here by you on 23/10/14: "It looks like there's a bullying mentality among the regulars on here and that when someone reacts in the same way that they don't like it. Interesting. I wonder how these people behave in real life. My bet is that these personas are restricted to the internet. All mouse and no trousers..." By a year later you've joined the bullies yourself.
Yes, theory. Go and gorge to your heart's delight on non sugar food and you will still get fat. Eating too much makes people fat is the principle, not eating too much sugar makes you fat. Which is why a sugar tax isn't the way to go, it's a barking up the wrong tree. Individual gluttony and sloth are to blame for obesity, not food manufacturers or sugar in food per se. When an obese person bothers to take personal responsibility and limit their calorie intake (e.g. to under 2000/2500 calories, as befits their own circumstances) the overweightness starts to reduce. It's the all day grazers who won't limit their calorie intake responsibly who want to pretend the cause is something other than their own casual gluttony. If they counted the calories they are shoving in their faces, they'd find they are going way over on a regular basis, but they are probably in denial about this. Far easier to blame someone else or something else (sugar; food manufacturers) than take personal responsibility and limit calorie intake appropriately.