#impossible_action__impossibility  an alternative that is not available
  subtype:  impossible  something that cannot be done; "his assignment verged on the impossible"
  supertype:  alternative__option__choice  an alternative action; "what option did I have?"; "there no other alternative"; "my only choice is to refuse"
     supertype:  decision_making__deciding  the cognitive process of reaching a decision; "a good executive must be good at decision making"
        supertype:  higher_cognitive_process  cognitive processes that presuppose the availability of knowledge and put it to use
           supertype:  cognitive_process__cognitiveproces__process__proces__cognitive_operation__cognitiveoperation__act  the performance of some composite cognitive activity; an operation that affects mental contents; "the process of thinking"; "the act of remembering"
              supertype:  process__proces  situation commonly considered as making a change during some period of time
                 supertype:  situation  something that "occurs" in a real/imaginary region of time and space
                    supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                 supertype:  process_or_process_description
                    supertype:  processing_thing
                       supertype:  thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                          supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
              supertype:  process__proces__physicalsituation  intuitively, the class of things that happen and have temporal parts or stages; examples include extended events like a football match or a race, actions like pursuing and reading, and biological processes; sumo#process is not identical to pm#situation because an instance of pm#situation is not necessarily an instance of sumo#physical
                 supertype:  situation  something that "occurs" in a real/imaginary region of time and space
                 supertype:  process_or_process_description
                 supertype:  physical__physical_thing  an entity that has a location in space-time; locations are themselves understood to have a location in space-time; click here for more details on the identical category sowa#physical_thing
                    supertype:  thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

No statement uses or specializes impossible_action; click here to add one.