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