Anchor: The men focus on a way to catch that snake.
Entailed: There are people looking for an animal.
Contradiction: The men are focusing on a method to catch the tiger.
Contradiction: Reagan was known to have a perfect memory while in office.
Contradiction: The boy is not playing ball.
Contradiction: There aren't any towns in national parks, only animals and plants.
Contradiction: People did not rear animals or irrigate land until this time.