Anchor: The exact cause remains unknown, but all the palaces were destroyed at the same time.
Entailed: All of the palaces were demolished at the same time, but no one is certain of the cause.
Contradiction: The cause of the palace destruction is well known to everyone. 
Contradiction: It is true that jurors never have doubts and they are always sure of themselves.
Contradiction: A human lying
Contradiction: Including staff in improvement efforts makes change far more difficult than necessary.
Contradiction: A dog is in the grass.