Anchor: Jon had never bothered to learn their names.
Entailed: Jon did not know any of their names. 
Contradiction: Jon not only knew all their names, he knew the names of their children and pets as well. 
Contradiction: I'm stuck in the office all day. 
Contradiction: a dog is running through a grassy field.
Contradiction: There was an ugly gladiator for you.
Contradiction: When they are young adults they really lose interest.