Anchor: There are, to be sure, pivotal generational experiences.
Entailed: Generations have pivotal experiences. 
Contradiction: Generations do not have pivotal experiences. 
Contradiction: There is no ashtray.
Contradiction: The islanders were brave and resisted heroically.
Contradiction: I was not surprised at all that he said the man was likely to go free.
Contradiction: The sage of Cambridge is workmanlike.