Anchor: A man is paddling in whitewater rapids.
Entailed: A man is whitewater rafting
Contradiction: A man fell out of his kayak
Contradiction: It costs less then $1000 dollars to develop this training program. 
Contradiction: The order was right.
Contradiction: A man is running a marathon.
Contradiction: Not only is it not perfectly sound, it is also merely a clever device.