 Yet other links between the approaches have also be found, which are motivated by other kind of questions and use formalisms that are closer to the situation-theoretic ones. For example, consider a setting in which agents have incomplete information about an intended subset of a set of epistemic states. How can a relation of accessibility arise from such a setting? (Notice that this is different to the setting of epistemic constraint models described above, where agents do have complete information about what holds true of all the epistemically accessible worlds). One way to address this question (Barwise 1997) is to consider a fixed classification \(A\), the instances of which are the epistemic states, plus a local logic per agent attached to each state. For some states these local logics may be incomplete (see  section 2.3),  so agents may not have information about everything that holds true of the intended range of states. Then, roughly, the states accessible from a given state \(s\) and agent \(a\) will be those whose properties (types) do not contradict the local logic of \(a\) in \(s\). With these epistemic relations in place, classification \(A\) can be used to interpret a basic modal language. 