’No, I knew this valve wouldn’t work if I left a part out,’ Orr answered, glowing with cranberry-red elation because he had just duped Yossarian again.
His cheeks grew tight with fury at the thought that he had just been duped into humiliation by a man who was almost the same age as he was and still only a captain, and he swung upon the chaplain avengingly with a look of such murderous antagonism that the chaplain began to tremble.
There are no more uses of "dupe" in the book.
Show samples from other sources
The immigrant was duped because he trusted everyone
She is innocent. She was duped like the rest of us.