For example, Einstein postulated that the speed of light,
c, is constant in all inertial frames of reference.
Bohr postulated that electrons go around the atom in orbits and that there are pre-defined orbits, and that moving from a higher orbit to a lower orbit makes releases energy.
I bet there are many other postulates that we take for granted.
Therefore I've a question, how can we claim something violates some physical law, when so many physical laws have been postulated?
All it takes is to disprove one of the postulates and suddenly a lot of things break down because of the claims that are based on the postulates.