’Does he expect us to believe that?’ cried the major incredulously.
’For an intercom?’ asked Kid Sampson incredulously.
Milo assailed them incredulously at the top of his voice.
Yossarian cried incredulously, and he pointed to the deepening pool of blood he felt splashing down all around him and spreading out underneath.
’What was that?’ roared General Dreedle incredulously, and whirled around in a murderous rage upon Major Danby, who staggered back in terrified confusion and began to quail and perspire.
Yossarian stared at Dobbs with an incredulous scowl.
’Tu sei pazzo!’ she shouted at him with incredulous indignation, and sprang out of bed.
Tears of great elation were sparkling in his eyes, and Yossarian leaped out of bed with an incredulous yelp when he finally understood.
The chaplain’s eyes bulged out incredulously.
A moan of incredulous dismay wafted from his lips as, still clutching his throbbing, tender, burning bowels in both hands, he dropped his full weight down against her shins and knocked her legs out from under her.
’That’s right, you bastards, Bologna,’ he kept repeating to all the bombardiers who inquired incredulously if they were really going to Bologna.
There are no more uses of "incredulous" in the book.
Show samples from other sources
I find it incredulous that you believe she is sincere.