Anchor: we may we may need a constitutional convention
Entailed: We might need a convention.
Contradiction: There's no way a constitutional convention would help.
Contradiction: Since his last visit there almost everything in the room has been moved. 
Contradiction: It has been very intriguing. 
Contradiction: The century's greatest thinker caused a lot of oppression.
Contradiction: If you plan on playing roulette, you should ask for a computerized admission card.