Anchor: In These cases, the piping may be insulated and heat traced to prevent condensation of the ammonia vapor.
Entailed: The piping can be insulated.
Contradiction: The piping can't have insulation on it.
Contradiction: The dog has no legs.
Contradiction: A man is in a donkey-powered machine
Contradiction: A man riding a unicorn.
Contradiction: The church/abbey is its great landmark.