Text: But then, having learned how evil civilized Englishmen can be, Tarzan, Jane, and her father (in the PC universe, old and feeble white men are tolerable) decide to renounce civilized society for the jungle.
Entailment: Tarzan, Jane, and her father renounced society due to the Englishmen.
Contradiction: The Englishmen decided to renounce civilized society because of Tarzan.