Definition implies equality. Equality is commutative. If “human values” equals “whatever vague cluster of things human brains are pointing at” then “whatever vague cluster of things human brains are pointing at” equals “human values”.
Definition implies equality. Equality is commutative. If “human values” equals “whatever vague cluster of things human brains are pointing at” then “whatever vague cluster of things human brains are pointing at” equals “human values”.