The phrase "empirical verification" refers to the process of proving or testing something using real-world observations or experiments. It involves collecting data and evidence to support or confirm a hypothesis or claim. Full definition
Finally, metaphysical assumptions are one stage further from direct empirical verification or falsification, yet even these are not totally immune to change. (religion-online.org)
In his lecture, Sobouti traversed the continuum of human knowledge: from the «exact sciences» such as physics and chemistry that can be tested, verified and advanced, to the «opinion - based creeds,» which resist empirical verification. (aaas.org)