Dancing Hoskuld
Deity
In science you have in increasing order of certainty "hypothesis", "law" and at the top "theory". Hypothesis are things you want to test. Laws and Theories have passed all the tests so far.
Finding cases which don't match Laws or Theories gives rise to hypothesis that are tested and may lead to modifications or new ideas. None of these match reality but move closer to it all the time.
Newton's Laws of gravity work and are applicable in most day to day stuff it is only as you approach the extremes of mass and velocity that Einstein's theories make any difference to calculations. Newton's Laws of gravity have not been replaced just supplemented by Einstein's theories.
Finding cases which don't match Laws or Theories gives rise to hypothesis that are tested and may lead to modifications or new ideas. None of these match reality but move closer to it all the time.
Newton's Laws of gravity work and are applicable in most day to day stuff it is only as you approach the extremes of mass and velocity that Einstein's theories make any difference to calculations. Newton's Laws of gravity have not been replaced just supplemented by Einstein's theories.