Anchor: A person attempting a stunt using a snowboard and some wooden pallets while it is dark outside with snow on the ground.
Entailed: Someone is trying to do something active outside of daylight hours.
Contradiction: A person is sleeping in his bed.
Contradiction: The person is eating cheerios and watching TV shows.
Contradiction: It is sunny outside.
Contradiction: Four men are playing golf in shorts and polo shirts on a sunny desert course.
Contradiction: A person is sitting.