I like your use of the scientific method here too, and using it to debunk Lex's plot.
Your explanation could be explained as working in the LnC universe, even if a thermodynamics scientist would disagree with it in our universe. And I have no idea if one would. After all, a man whose molecular structure is denser than humans and can fly makes me think there's something different at least about some Laws of Physics in the LnC universe. Why not thermodynamics?
