#irrelevance  the lack of a relation of something to the matter at hand
  exclusion:  relevance
  subtype:  inapplicability  immateriality
  supertype:  unconnectedness  the lack of a connection between things
     supertype:  relation  an abstraction belonging to or characteristic of two entities or parts together
        supertype:  thing_that_can_be_seen_as_a_relation  usable as relation type
           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

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