It is weird to teach science by doing “an experiment” in which the results are well known, that is actually a demonstration. I think doing demonstrations like this help kids learn science techniques “hands on” as much as concepts. A mistake in calculations or technique is not an anomaly; if you want to demonstrate something about pendulum and conservation of energy, and are told to release the pendulum but instead push it forcefully, is that an anomaly or a poorly executed demonstration?

Knowing something about astronomical history, I thought Kuhn’s example of Hershel holding off on declaring Uranus example was wildly off base, I could write 10 pages just about that.