Anchor: But prophecy is always strongest when based on coincidence--that is a prime rule.
Entailed: A principal rule is that prophecies derived from coincidence are the strongest.
Contradiction: Prophecies based on coincidences are widely known to be weak and unreliable.
Contradiction: We have not managed the Y2K transition successfully.  
Contradiction: The sheep is getting a haircut
Contradiction: The group was taking pictures near a dump.
Contradiction: GAO made contributions to help Congress improve their functioning.