Anchor: take a twenty two and find a creek
Entailed: Grab a small caliber gun (.22) or rifle (.22) and find a stream.
Contradiction: Take a crossbow and find a waterfall. 
Contradiction: black students don't care about their grades
Contradiction: The Hong Kong International Film Festival occurs in April.
Contradiction: The town is young but nothing is known of its history.
Contradiction: I'll probably have to sell the prize