There were things of the times, and a few things that were timeless. The times came as a result of a particular human culture. The timeless came as a… - Walter M. Miller

The monks of the earliest days had not counted on the human ability to generate a new cultural inheritance in a couple of generations if an old one is utterly destroyed, to generate it by virtue of lawgivers and prophets, geniuses or maniacs; through a Moses, or through a Hitler, or an ignorant but tyrannical grandfather, a cultural inheritance may be acquired between dusk and dawn, and many have been so acquired. But the new "culture" was an inheritance of darkness, wherein "simpleton" meant the same thing as "citizen" meant the same thing as "slave." The monks waited. It mattered not at all to them that the knowledge they saved was useless, that much of it was not really knowledge now, was as inscrutable to the monks in some instances as it would be to an illiterate wild-boy from the hills; this knowledge was empty of content, its subject matter long since gone. Still, such knowledge had a symbolic structure that was peculiar to itself, and at least the symbol-interplay could be observed. To observe the way a knowledge-system is knit together is to learn at least a minimum knowledge-of-knowledge, until someday — someday, or some century — an Integrator would come, and things would be fitted together again. So time mattered not at all. The Memorabilia was there, and it was given to them by duty to preserve, and preserve it they would if the darkness in the world lasted ten more centuries, or even ten thousand years...

He had never seen a "Fallout," and he hoped he'd never see one. A consistent description of the monster had not survived, but Francis had heard the legends. He crossed himself and backed away from the hole. Tradition told that the Beatus Leibowitz himself had encountered a Fallout, and had been possessed by it for many months before the exorcism which accompanied his Baptism drove the fiend away. Brother Francis visualized a Fallout as half-salamander, because, according to tradition, the thing was born in the Flame Deluge, and as half-incubus who despoiled virgins in their sleep, for, were not the monsters of the world still called "children of the Fallout"? That the demon was capable of inflicting all the woes which descended upon Job was recorded fact, if not an article of creed.

They don't think up questions like that on the basis of what might be true; they concoct the questions on the basis of what might be sensational if it just happened to be true.