Anchor: Clearly, none of the extant studies could be done without the support and involvement of emergency medicine physicians and trauma surgeons.
Entailed: The studies could not be done sans the aid of the physicians.
Contradiction: The studies would be better off without the help of physicians.
Contradiction: Dancing together at a concert.
Contradiction: The skyscrapers are divided by a road.
Contradiction: If things are going poorly. you say the President is to blame.
Contradiction: People who are not fishing and just watching may pay as little as 5,000 esc.