Quote Originally Posted by Workshopshed View Post
Not being a mathematician or a physicist my engineering brain says that all the "laws" are just useful models to be discarded or enhanced when we find a better one.
Don't confuse the laws with the explanations of why the laws exist. The latter can and have changed but the former, most often derived from direct observation of nature, tend to remain.

Newton described gravity mathematically but couldn't provide a convincing explanation for its source. Over the years other explanations were offered and discarded. Einstein finally had to bend space and time to provide a source for the force and an explanation of why it seems to act instantaneously.

Through all that messing about the law itself remained unchanged. It's probably correct based on the observation that we can fire off satellites, sling them around planets and effect intersections with objects billions of miles away by using it in its ancient form.

It's a major tenet of physics that, if you come up with a new theory, it most properly encompass already existing laws that are known to be correct. Einstein's relativistic equations have to reduce to Newtonian mechanics when the velocities are appreciably less than the speed of light.