Anchor: Suppose a potential competitor needed a critical mass in order to begin operations.
Entailed: A potential competitor may need a critical mass in order to start operating.
Contradiction: A potential competitor does not need a critical mass. 
Contradiction: The man runs away from a vicious dog.
Contradiction: The man is reading.
Contradiction: There was a horse on fire near the blond girl.
Contradiction: A man is standing above a crowd.