Anchor: "Not officially." Drew smiled.
Entailed: Drew smiled, "Unofficially."
Contradiction: Drew frowned, "Officially."
Contradiction: A man prepares lunch.
Contradiction: The two heavy smokers stink up the rest of the building in three (3) months. 
Contradiction: There is no preamble to the rule, the FDA neglected to draft one.
Contradiction: The man is riding the subway.