 besides the Nth, there might be any number (including zero) of things such that, if taken as the Nth argument, PRED holds of those arguments. For example, the format of #$biologicalMother's first argument-place is #$SetTheFormat, since a female animal might have any number of offspring. Unlike the other reified instances of #$Format, #$SetTheFormat actually places no restriction at all on what PRED might or might not hold of with respect to the relevant argument-place. But one should not infer from this th