if one thing can do something but another thing can not do that something then those two things are different
everything is one_thing. change is not thing. separated_thing is divided_thing. separated_thing is not divided_thing. change is when_one_thing_becomes_another_thing. things is often_not. all_things is not things. tangible_thing is not three_dimensional_thing. change is not when_one_thing_becomes_another_thing. everything is not one_thing.