if two things are both something else, then they are different kinds of that something else
another_way_to_say_separates_things is divides_objects. separated_thing is divided_thing. else is river. change is when_one_thing_becomes_another_thing. all_things has opposite pair_of_things is two_things. everything is one_thing. all_things is things. bins_and_boxes is both_things_for_storing_other_objects. opposites is two_things.