Anchor: A man is skiing down a mountain with another large mountain behind him and a river between the mountains.
Entailed: There are at least two mountains near each other.
Contradiction: A man is skiing away from an evil snow yeti.
Contradiction: A man sledding down a hill.
Contradiction: The man is sitting with his skis on.
Contradiction: A man is skiing down Mount Olympus.
Contradiction: Man running laps around a track.