#common_ground  a basis agreed to by all parties for reaching a mutual understanding
  supertype:  #basis__basi__footing  a relation that provides the foundation for something; "they were on a friendly footing" or "he worked on an interim basis"
     supertype:  #foundation  the basis on which something is grounded; "there is little foundation for his objections"
        supertype:  #relation  an abstraction belonging to or characteristic of two entities or parts together
           supertype:  pm#thing_that_can_be_seen_as_a_relation  usable as relation type
              supertype:  pm#thing_playing_some_role  category to classify things according to roles/viewpoints; classification under this category is application-dependant
                 supertype:  pm#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 #common_ground; click here to add one.