if something is formed by something else, then that something else is required by that something
else is river. change is when_one_thing_becomes_another_thing. planting is not putting_into_else. space is what_between_else. creating_from_raw_materials is creation. space is not what_between_else. planting is putting_into_else. change is not when_one_thing_becomes_another_thing. thing is substance. creating_from_raw_materials is not creation.