  However, some philosophers would want to distinguish even such bipolar facts from propositions. Bipolar facts, the argument goes, are states of affairs, rather than true propositions. Clearly, not all propositions can be possible states of affairs, because there are propositions that are not possibly true, whereas possible states of affairs must obtain in at least some possible world. We might wish to extend the notion of a state of affairs to include impossible ones. Whether states of affairs, understood in this extended sense, are propositions clearly depends on the answers to questions about their identity conditions. See the entry on  states of affairs,  as well as Richard (2013) for a recent view identifying propositions with states of affairs.