Anchor: However, evolutionary acquisition has yet to be consistently implemented with success on individual weapon system acquisitions.
Entailed: Evolutionary acquisition has yet to be consistently implemented with success.
Contradiction: Evolutionary success has yet to fail once!
Contradiction: The man is walking down a grassy street on a sunny day.
Contradiction: A woman is holding a camera.
Contradiction: I did not dare, my friend.
Contradiction: A dog is running.