Presented at North American Conference on Philosophy and Computing (Loyola University, Chicago, US)

Abstract. The present paper expands upon the previously defended thesis of informational pluralism. This is the view that the content conveyed by a message is a function of the level of abstraction at which the relevant communication is modelled. Specifically, it focuses on the problem of how content and presumed content should be evaluated in settings where the communication is equivocal.

The formal approach is a defeasible account of perceived content. Its functioning is studied informally in terms of the relevant levels of abstraction and the relation of simulation between those levels, and formally characterised in terms of informorphisms between classifications.