All ontologies are false. But some are useful.

All ontologies people claim to be ontologies are false in toto

All "ontologies" are false.

There is, to disquote, one ontology which is true -- and the game is to find it. The reason getting close to that one is useful, the explanation of utility, is its singular truth

To be a lumper for a second, all models are flawed. But some are useful.