Anchor: The argument is that the Senate should reject the case not because it's unproven but because it's politically motivated.
Entailed: The argument is that the Senate should reject the case because it's politically motivated, not because it's unproven.
Contradiction: The Senate should not reject the case, because there is no proof.
Contradiction: I don't think anyone expected Jesse to receive a nomination. 
Contradiction: a boy is in the pool with floaties on
Contradiction: The men are in a boat.
Contradiction: A person is playing baseball.