if something does not contain something else, then that something else cannot be lost in that something
lost_river is not tangible_thing. thing is not substance. separated_thing is not divided_thing. goods is not tangible_thing. else is not river. another_way_to_say_separates_things is not divides_objects. space is not what_between_else. everything is not one_thing. anything_else is not film. something_that is not ours_belongs_to_us.