How do we know the geese the OP speak of were not Canadian? Could be Canada Geese from Canada which would then properly be Canadian Canada Geese. Could be any

How do we know the geese the OP speak of were not Canadian? Could be Canada Geese from Canada which would then properly be Canadian Canada Geese. Could be any other species of Goose from Canada which would still be Canadian Geese, but just not Canadian Canada Geese (or is that Canadian non-Canada Geese?). If you want to pedantically split hairs, why stop 1/2 way. We need a xkcd style venn diagram here.