Anchor: A group of seven people are rafting in the rapids in a green boat.
Entailed: There are people rafting.
Contradiction: A group of people are canoeing.
Contradiction: Capitalized property can't be revalued.
Contradiction: The man does not wash his hair as frequently as others.
Contradiction: This need is new. 
Contradiction: They were not wealthy, I'll talk to you another time.