Max Planck, a highly-regarded physicist, discusses one of the foundational assumptions necessary for the discipline of science.
We have no right to assume that any physical laws exist or if they have existed up to now, that they will continue to exist in a similar manner in future. It is perfectly conceivable that one fine day nature should cause an unexpected event to occur which would baffle us all; and if this were to happen we would be powerless to make any objection, even if the result would be that, in spite of our endeavors, we should fail to introduce order into the resulting confusion. In such an event, the only course open to science would be to declare itself bankrupt. For this reason, science is compelled to begin by the general assumption that a general rule of law dominates throughout nature or, in Kantian terminology, to treat the concept of causality as being one of the categories which are given a priori and without which no kind of knowledge can be attained.
Max Planck, in his book The Universe in the Light of Modern Physics, translated by W. H. Johnston. Planck is considered to be one of the founders of quantum mechanics. In 1918, he was awarded the Nobel Prize in Physics for his services “to the advancement of Physics by his discovery of energy quanta”.