Anchor: The key to peace lay in Nixon's decision to jettison his demand that Ho Chi Minh withdraw from South Vietnam--a demand that he could have renounced four years earlier, sparing 18,000 American lives.
Entailed: Nixon decided that Ho Chi Minh could stay in South Vietnam.
Contradiction: Nixon's decision to force Ho Chi Minh to withdraw saved 18,000 American lives 
Contradiction: A man is yelling at his wife.
Contradiction: Rain on an object
Contradiction: Is there a difference between federal taxes and deficits?
Contradiction: A group of surfers is waiting to catch a wave