• Carnot efficiency is independent of the working fluid, which means that physical concepts are detached from physical entities.

Thermal engine system: Pistons, containers, heat sources, etc. are all designed to serve the working fluid, and studying thermal engines is studying the working fluid. Carnot efficiency is independent of the working fluid, and it has become a concept suspended in the air.

• This one is wrong, the entire second law of thermodynamics is incorrect.
• Scientists are all smart people, how could they accept such a theory.