Anchor: A person in a wetsuit is surfing on the water.
Entailed: The person is on water.
Contradiction: The person is swimming.
Contradiction: America is not sending any more troops to help.
Contradiction: The Pio-Clementino Museum has a wonderful collection of Roman and Greek art. 
Contradiction: Conquistadores were most interested in learning the cultures of other people.
Contradiction: The pet has turned into a member of the nuclear family.