Anchor: Several people are on a boat in the ocean with scuba gear.
Entailed: several people are on a boat with scuba gear
Contradiction: the boat is full of people with hang gliding gear
Contradiction: Two people walk in the sun snine.
Contradiction: The person in on a bike.
Contradiction: What has happened in the last 20 days regarding use of the US postal service by Armenians.
Contradiction: Some things are just not.