A Fein(man), Fine Mess of Thermodynamics

I was truly baffled beyond all bafflement (is that a word?) that Feinman & Fine wrote "A calorie is a calorie" violates the second law of thermodynamics, let alone that it passed the peer review process to be published in any reputable journal.  In the abstract they write:

Here, we propose that a misunderstanding of the second law accounts for the controversy about the role of macronutrient effect on weight loss and we review some aspects of elementary thermodynamics.

Here I propose that it is their apparent misunderstanding of thermodynamics, as put forth in this "study", that accounts for most of the gimmickry surrounding low carb diets in the community.  In the section entitled "Thermodynamics", they write:

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