Anchor: A man is standing on a rock bent over in complete scuba gear.
Entailed: A guy is getting ready to go scuba diving.
Contradiction: The man is scuba gear does not know how to scuba dive.
Contradiction: He said that the boys were running around and causing trouble.
Contradiction: I was in Dallas for a week last month. 
Contradiction: Nobody is sitting.
Contradiction: Bicycle rider riding in town