Anchor: I'm sure blackmailers never arrive in buses!
Entailed: I am pretty certain blackmailers do not travel by bus.
Contradiction: I am sure all blackmailers travel by bus.
Contradiction: The dog is running inside.
Contradiction: A man demonstrating athetic ability.
Contradiction: There are not many people sitting down and walking around on concrete.
Contradiction: More than one person had an orgasm together.