The first excerpt comes from chapter nine, about halfway into the book. By this point, Deckard has been given Holden's list of illegal androids to test and retire, and has tracked the first on his list, Luba Luft (Zhora), to a Theater where she is rehearsing in a production of Mozart's Opera, The Magic Flute.
During questioning, Luba Luft repeatedly interrupts Deckard.
"An android," he said, "doesn't care what happens to another android. That's one of the indications we look for."
"Then," Miss Luft said, "you must be an android."
That stopped him; he stared at her.
"Because," she continued, "your job is to kill them, isn't it? You're what they call--" She tried to remember.
"A bounty hunter," Rick said. "But I'm not an android."
"This test you want to give me." Her voice, now, had begun to return. "Have you taken it?"
"Yes." He nodded. "A long, long time ago; when I first started with the department."
"Maybe that's a false memory. Don't androids sometimes go around with false memories?"
Rick said, "My superiors know about the test. It's mandatory."
"Maybe there was once a Human who looked like you and somewhere along the line you killed him and took his place. And your superiors don't know."
She smiled, as if inviting him to agree.