 Arbitrary first and higher order levels of knowledge and belief can be represented with the above relational models, the standard tool in  epistemic  and doxastic logic. For information in extensive form games, the epistemic-doxastic perspective on states can be combined with \(\move\)-relations in exactly the way described before. The result are epistemic-doxastic trees or forests that can represent most types of knowledge or belief players might have about the game, including its exact shape, previous moves, opponents’ preferences or opponents’ first- and higher-order beliefs on any of these matters.