I have a question on pseudogravity as invoked in thought experiments related to the principle of equivalence. One invents ‘gravity’ opposite to an accleration to explain weightlessness, the bending of light beam, the dilatation of time period, and twin paradox. I can explain all of the above without invoking pseudogravity. Has actual experiments been done to confirm that actual new gravity was present opposite to an acceleration? Can you please cite me references? No theory, please.