if nothing can be identified as different because of something then they are distinguishable by that something
everything is one_thing. pileable is not tangible_thing. separated_thing is not divided_thing. disambiguating is not understanding. colour is not way_people_differentiate_things. marking is not tangible_thing. one_dimensional_thing is not shaped_thing. collapsible_thing is not tangible_thing. no_thing is not nothing_yet_no_one_knows. everything is not one_thing.