Anchor: I MAY decide to pay for the witty articles and intelligent social commentary in Slate when you start charging.
Entailed: I might pay for the articles when the charges start. 
Contradiction: I will absolutely not pay when you start charging. 
Contradiction: Two young men peer out of a darkened store window.
Contradiction: There is a man on the bus with flowers.
Contradiction: The third type of city delivery route is by train.
Contradiction: A woman looks out the window.