Anchor: She whispered back for a short time.
Entailed: She whispered, but not for long. 
Contradiction: She shouted for a short time. 
Contradiction: He wasted no time thinking about what he was going to say.
Contradiction: Weapon system development requires a willingness to adopt an evolutionary approach.
Contradiction: The cat toys with the catastrophically injured yet alive mouse before putting it out of it's misery.  Just a few more broken ribs and guts coming out the anus, and Kitty Kat will let you die, mouse.  Then the cat will go leave a steaming pile of parasitic feces in the litterbox.  Cats are cute!
Contradiction: There's a statue of Prince Henry the Navigator in the park.