I never understand the thermodynamics argument in terms of weight gain. Surely you acknowledge that some solar cells and mechanical engines are more efficient than others?<p>Additionally, do you acknowledge that some drives are more irresistible than others? Can you hold your breath until you pass out?<p>Is it so hard to imagine these drives might differ from person to person? I fully acknowledge that, irrespective of your body&#x27;s efficiency, if you could ignore your drive magically, you would lose weight with no problem, but that is far from a useful endpoint because <i>the drive matters</i>.