"Rita is an excellent librarian. She has the ability to recall facts and figures beyond most people. She has almost an eidetic memory. Whether Carroll is sane or completely schizophrenic-paranoid, his statements and his theories are solid when based upon his own line of reason.
"That his line of reason does not agree with heretofore known physical facts is of no consequence since several of the unsound, unscientific, un-factual reasonings have produced things that work. Unsound as they may seem, they are not unreasonable—excepting to us who can not reason that way."
"Get to the point."
"Whether Carroll urges Rita to display a horde of facts because he thinks they come from an alien mind in a human body, or whether he understands the truth—that they are merely repeats of his own statements made when he does not recall them—the fact remains that Rita is his tabulator, his encyclopedia of fact, his memory. She and she alone can put down concurrently things he has reasoned out, once when himself and next when he is—un-sane."
"But she's in danger!"
"So are we all," replied Pollard easily. "And Rita herself knows the danger. And," he added with a snort of derision, "of what good is your so-called moral integrity going to do you a year from today if James Forrest Carroll is stopped from preventing the calamity due to erase Sol from existence in a month?"
"He's a madman. How can you believe that this danger really exists?"
"The danger is what drove him mad."
"And made him believe that Rita and I are aliens?"
"Merely manifestations of the hallucination."