eh, momentum has a pretty rigorous definition and it's possible to define it qualitatively. perhaps a better example would have been hardness, where A is harder

eh, momentum has a pretty rigorous definition and it's possible to define it qualitatively. perhaps a better example would have been hardness, where A is harder than B when it scratches B in a test. but it's borderline, and quite a bit different from true circular reasoning test X measures I(x) I(x) is defined as the thing test X measures. Therefore test X measures the pre-existing psychological trait intelligence. this is absurd