maybe you were hallucinating and there was no ball ...at which point you've left the domain of science and have entered the philosophical domain of epistemolog

maybe you were hallucinating and there was no ball ...at which point you've left the domain of science and have entered the philosophical domain of epistemology. Neither the existence of the term "mathematical proof" nor epistemic quandaries invalidate the concept of scientific proof, and what that term means within the domain of the natural sciences.