The Nest's adherence to common sense is like opening your closet and finding, in the darkness, a thing pretending to be human.
Even though you both know it's not human—no human crouches in the shadowy corner of a closet, slowly unhinging their jaw as the black void of their face stretches longer and longer—the moment your eyes meet, it still mimics human custom, greeting you, "Good evening. Home from work?"
In other words, the Nest's adherence to common sense is just like that: persistent, but utterly bizarre.
Take the poster-pasters, for example.
According to the Nest data in Mai Mingle's mind, the Nest clearly considered the existence of this type of resident to be a matter of course:
Of course there have to be poster-pasters!
