One of my most rewording experience in high-school physics was tracing the history of our understanding the speed of light. Specifically, the series of experime

One of my most rewording experience in high-school physics was tracing the history of our understanding the speed of light. Specifically, the series of experiments and explanations we went through to arrive at the conclusion that it is constant relative to the observer. I wont recount the specifics for fear of making a mistake, but the big takeaway was that the process was not one of finding the correct answer nearly as much as it was finding that our (then) current answer was incorrect. All this tells us of our current understanding is that it hasn't been disproven yet.