Eb stalks back into the room with an overhead projector dangling from one hand, looking for a moment like Beowulf brandishing a monster’s severed arm. He puts it on the table and aims it at the wall. There is no need for a screen, because above the ubiquitous power strips, every wall in the house is covered with whiteboards. Many of the whiteboards are, in turn, covered with cryptical incantations, written in primary colors. Some of them are enclosed in irregular borders and labeled DO NOT ERASE! or simply DNE or NO! In front of where Eb has put the overhead projector, there is a grocery list, a half-erased fragment of a flowchart, a fax number in Russia, a couple of dotted quads—Internet addresses—and a few words in German, which were presumably written by Eb himself. Dr. Eberhard Föhr scans all of this, finds that none of it is enclosed in a DNE border, and wipes it away with an eraser.