Anchor: A motorcyclist wearing full protective gear on a green bike is about to descend a dirt mound.
Entailed: A motorcyclist is riding a bike.
Contradiction: The motorcyclist has no helmet on.
Contradiction: A motorcyclist without a helmet races down the highway.
Contradiction: The former term is used only by economists, the second used only in postal rate circles.
Contradiction: I was staggered by the man's quietly assured manner of speech.
Contradiction: my strength has always been composing music