Anchor: a snowboarder jumps off of a ramp in the snowy mountains
Entailed: A being jumping
Contradiction: Nothing is jumping.
Contradiction: The Jew is talking with a wireless radio.
Contradiction: There's a program in Maryland called Adopt-A-Highway.
Contradiction: There is no victory even if the Russian flag is flying in Grozny say Russian generals.  
Contradiction: The boy is chewing.