 Fine (1988b) also developed a semantics over which RQ is complete and which can be modified to accommodate any of the mainstream relevance logics. Fine’s semantics is “stratified”. This means that a model is made up of a collection of miniature models, each with its own domain of individuals. Each of these mini-models is related to models with larger domains, and each world in a model is similarly related to worlds in these models with larger domains. A very clear explanation of how Fine’s semantics works is given in Shay Logan (2019). 