You presuppose that all the people in the world and scientists are actually people too. Sure the laws of the universe seem to be consistent in a Newtonian fashion as far as yourself have bothered to check. I don’t think you’ve done much personal quantum mechanics.
The problem is more Cartesian, in the first place, maybe Trumanian. The others might be bad faith actors. Are you able to trust your senses, if so the other people?