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:
Question: Being an imprecise hypothesis, it was not widely supported at first, but became much more popular the moment Einstein gave it the name, Mach's principle. True, False, or Neither? 