The Worklike Reversible Ener Transfer

i shall call systems that have the property work med they include weights and springs, but also microscopic particles like atoms and cubits in particular states. The fact that they permit a sea soaring transformation is the counter factual property that singles out all systems that can undergo worklike reversible ener transfers among one another. It is what we needed to complete the formulation of the counter factual second law, to make its domain of applicability well defined. For instance, the ideal frictionless csaw implements a worklike energy transfer between two weights on each side because each qualifies as a work medium.