Anchor: A solo snowboarder swooshes down a mountain leaving a cloud of powdery snow in his wake.
Entailed: One snowboarder races down the mountain with a trail of mist in his wake.
Contradiction: A man is on a pair of skis.
Contradiction: The sand surfer leaves a cloud of sand in his wake.
Contradiction: The snowboarder is putting on his snow shoes.
Contradiction: The person is sitting in the ski chalet, sipping hot chocolate.
Contradiction: The snowboarder snowboarded with his friends.