Anchor: Occasionally, it is necessary to install a new smoke stack, and it may be necessary to add more fan capacity.
Entailed: Adding more fan capacity might become necessary on occasion.
Contradiction: From now on it is no longer a necessity to install a smoke stack.
Contradiction: Two cats are fighting over a toy.
Contradiction: The Supplementary Information accompanying the final rule states that the final rule was not analyzed under Executive Order No.
Contradiction: guys are riding bikes
Contradiction: Borders covered it beautifully, but forgot the receipt inside.