The Experiment that Proves Empiricism

In a recent discussion in this space, which I, unfortunately, am finding I have insufficient time to spend discussing in proper and thorough detail, I issued the following challenge to not just the materialist I was debating, but to any any all materialists reading these word who might care to comment:

Is there ANYTHING ANYWHERE that ANYONE uses empiricism for other than ARGUMENTS ABOUT EMPIRICAL FACTS? Is there anyone anywhere who can even imagine, even as a joke, what proving a ...