Anchor: William Henry Harrison could talk about the governments of Athens, Rome, and the Helvetic Confederacy and expect his audience to know what he was talking about.
Entailed: Harrison could talk about several foreign governments and be on the same page with his audience.
Contradiction: Harrison did not expect a single person in his audience to know about government.
Contradiction: The bronze lantern is in the middle of the enclosure.
Contradiction: The patients were more likely to be young men with low incomes. 
Contradiction: An old man picks up a ball and starts playing with it.
Contradiction: Humans walking