 Imperfect information Logic games naturally support imperfect information, where players do not have complete access to what their opponents do. Epistemic variations can have far-reaching consequences for the corresponding logics. A particularly prominent framework among this lines is the  independence friendly logic  of Hintikka and Sandu (1989), see also Hintikka and Sandu (1997) and Mann, Sandu, and Sevenster (2011).