premise: In theoretical physics, particularly in discussions of , Mach's principle (or Mach's conjecture) is the name given by Einstein to an imprecise hypothesis often credited to the physicist and philosopher Ernst Mach. The idea is that local inertial frames are determined by the large scale distribution of matter, as exemplified by this anecdote:
hypothesis: Mach did not name Mach's principle.
reason: Mach's principle (or Mach's conjecture) is the name given by Einstein, so Mach himself didn't name it. The model confuses the fact that it is named for him, not by him.