Non-committal/agnostic/unassertive/abstaining/neutral tanru inversion.
This is not merely the assertion that any or some other CO will work (which is the elliptical case: co'o'e) nor that some connective between the identity (co'au'e) and full (co) inverses would do (such as: co'au'ejoico, co'au'ejaco, etc.; notice that these decompose into two distinct bridi which are connected as indicated). It is the assertion that the utterer does not care which CO is used here or that they are not necessarily asserting one way or the other (in fact, they are actively asserting a neutral or abstaining stance).