Combinatorially entailed relations are sometimes less precise than mutually entailed or directly trained relations. For example, in this frame of distinction, the combinatorially entailed relations between Z and Y are unknown. Although “unknown” isn’t as precise as the other relations, it is still a type of relation. We know that we do not know! That is, we know to respond to Z as though its relation to Y is unknown. For example, if someone asks us how Z is related to Y, we can confidently say “Who knows?!??”