 Fine’s project reflects the usefulness of Determinate incompatibility for his truthmaker semantics (Fine 2012a,b)—most notably, in providing a non-similarity-based account of the worlds entering into counterfactual deliberation, with the general idea being that a counterfactual world will be just like the actual world but for the replacement of some actual state \(s\) with a state \(s'\) that is a determinate under the same determinable as \(s\). As such, Fine’s ultimate aim is to provide a definition of the ‘co-determinable’ relation between states—a task which “avoids the tricky question of saying what exactly a determinable is” (2011: 184), though certain structural characterizations of determinables fall out of his account. Since Fine’s approach to characterizing determinable-determinate structure is rather intricate, we direct the interested reader to the attached  footnote.[36] 