Anchor: I was fairly certain that it was Mrs. Cavendish who had hidden it, but I had to make sure. 
Entailed: I had to make sure that Mrs. Cavendish hid it.
Contradiction: I was sure that Mrs. Cavendish had not concealed it
Contradiction: It was nice
Contradiction: They are outside.
Contradiction: A woman goes for a car ride in a convertible.
Contradiction: An event is taking place.