The second law of thermodynamics violates the physical definition of Carnot efficiency:
1) The second definition of thermodynamics states that Carnot is independent of the thermophysical properties of the working fluid.
2) The physical definition of Carnot efficiency includes the thermophysical properties of the working fluid.
1) And 2) is contradictory. See image for details
Scientists impart such problematic knowledge to the public, who feel happy to acquire it.