States of Affairs (Philosopjische Analyse/ Philosophical Analysis) - Tapa dura

States of affairs raise, among others, the following questions: What kind of entity are they (if there are any)? Are they contingent, causally efficacious, spatio-temporal and perceivable entities, or are they abstract objects? What are their constituents and their identity conditions? What are the functions that states of affairs are able to fulfil in a viable theory, and which problems and prima facie (counterintuitive consequences) arise out of an ontological commitment to them?