Abstract
Moral relativism is a tragedy and cognitive relativism is a farce – so Gellner argues. First the tragedy: moral relativism is consistent and compelling given moral diversity and contention worldwide. Then the farce: cognitive relativism is self-contradictory and logically false; it is also absurd in view of hard science, which gets testable, cumulative, applicable results that yield high tech; and it is insidious – where logical consistency and empirical accuracy are a dead letter, mummery rules.