Seems like a fair point to me. If science is really about reproducibility, then this is a fair question. How can we say with absolute certainty until we run a

Seems like a fair point to me. If science is really about reproducibility, then this is a fair question. How can we say with absolute certainty until we run a falsifiable experiment? Note that I'm not disputing our understanding of how stars work. The point is whether our understanding is based on reproducibility.