Anchor: People are talking and visiting on a bus.
Entailed: The people are on a bus conversing with each other.
Contradiction: The people are in the truck.
Contradiction: We can throw caution to the wind! 
Contradiction: Most slaves had lives of never ending strife, with no family to bear it with.
Contradiction: My feelings on the matter wouldn't change even if I had a bad personal experience.
Contradiction: In a way it's close to barbaric.