LogFAQs > #980010143

pedantry time: you're moving laterally across a conceptual hierarchy. cats are not dogs, they are both mammal pets. apples are not oranges, they are both round fruits. spaghetti sauce is not gravy, they are both sauces.

at best you could maybe combine them, since they are not mutually exclusive. "spaghetti sauce" surprisingly means "sauce intended to be put on spaghetti" and "gravy" means something like "thickened sauce with meat flavor/based on meat juice". those have no overlap besides 'sauce' but have no contradiction either, so "thickened sauce based on meat juice intended to be put on spaghetti" is a valid concept. but neither "spaghetti sauce" nor "gravy" captures that idea.