I'm worried this might devolve into semantics:
No worries, we agree. If by 'check' they meant 'check directly', then I agree the statement isn't right.
Another alternative reading is "can theoretically be checked". Obviously, this is strictly weaker, but still covers a large number of logical failures (e.g. creationism).
Alt-rockers They Might Be Giants explain/advocate empiricism in a record aimed at young children.
No, it's not quite Bayesian. The bridge ("A fact is just a fantasy, unless it can be checked") is more or less simply wrong. Still, I find the fact that the Ancient Art of Rationality is getting play at all pretty exciting. What do you all think? And what can we do to get more rationalist -- or even proto-rationalist -- ideas to youngsters?