The concept of 'inertial forces' is regarded as a sort of trick in Newtonian mechanics. What is fascinating here is the recognition that the Newtonian centrifugal force due to inertia is "a sort of trick." One would have expected the geocentric model of eg the geosynchronous satellite to be the one filled with tricks and fictional forces, but such is not the case. In the geocentric model, the forces are considered real.