if two things provide half of something to something else, then that something else will recive a full amount of that something
part is tangible_thing. separated_thing is divided_thing. n2 is tangible_thing. separated_thing is not divided_thing. pair_of_things is not two_things. third_party is tangible_thing. two_by_four is tangible_thing. tangible_thing is three_dimensional_thing. tangible_thing is not three_dimensional_thing. pair_of_things is two_things.