Anchor: The mechanism was a piece of superb craftsmanship that should have lasted for a million years, but it had never been meant to withstand the heavy shock of being dropped, as it must have been.
Entailed: The mechanism was  a work of superb craftsmanship.
Contradiction: The mechanism was designed with dropping in mind.
Contradiction: It was just yesterday that you were. 
Contradiction: There is a dog besides a pool.
Contradiction: A person is falling down outside.
Contradiction: A man and a child on a sidewalk.