Anchor: On Dave's world, the cardinal rule of logic was that the symbol was not the thing--and work done on symbols had to be translated by hard work into reality.
Entailed: On Dave's world, the symbol was not real.
Contradiction: On Dave's world, the symbol was the real thing.
Contradiction: They were such an awful team. 
Contradiction: The men are wearing pants.
Contradiction: The woman is sewing a dress.
Contradiction: A man is bike riding.