If you bought into the proposition, which El Shepherd apparently did, that the connectome was all that there was to the human brain—that, once you had created a digital record of the wiring diagram, and stored that in the cloud, you could throw away what was left of the body and not lose anything that mattered—then ion-beam scanning appeared to be the answer. The older technique, used on the eleven Ephrata Cryonics brains, had been to run them through what amounted to a high-precision bologna slicer, cutting away the thinnest possible layers, one at a time, and photographing what had been thus exposed, and then repeating the process. Then trying to trace the connections as they angled across the photographic layers. This was the hard problem that WABSI had attempted to gamify a couple of years ago. It was only as good as the thinness of the bologna slicing, the resolution of the photographs, and the attention span of the gamers.

Ion-beam scanning destroyed the brain a few molecules at a time in order to save it. A beam of charged particles, focused to subcellular precision, burned away the brain tissue. But as it did so it was gathering information about what it was destroying, and storing it to a much higher resolution than could be attained using the older technique. In its essentials it was the same as bologna slicing; it just worked at higher precision. Instead of a heap of paper-thin brain slices, the physical residue was smoke and steam. A higher form of cremation.

“Look,” Corvallis said. “As far as I am concerned, as a nerd who has read about it on the Internet? Yes. Of course. Way better than running it through a deli slicer and taking pictures.”

“I would go further,” El said, “and say that, once we have it up and running, we are done here. Even if we did later invent a higher-resolution system, it would serve no additional purpose. It would be like making a map of the United States at submillimeter scale: no better than a map done at centimeter scale.”

Corvallis broke eye contact and took a swallow of beer. In the last few moments, some kind of emotional sea change had swept over him. He had come to see all this talk of brain scanning as just another tedious detail to be sewn up as quickly as possible, preferably by other people. Two well-funded think tanks full of smart people—WABSI and El Shepherd’s cluster of foundations and startups—seemed to have independently arrived at the conclusion that ion-beam scanning was the be-all and end-all. Cloud computing companies, such as the one Corvallis worked for, had made the long-term storage of the resulting data so cheap and reliable as to be trivial.

So what was there to talk about? As El himself had just said, they were done here.

“What is your objective in coming up to Seattle today?” Corvallis asked him.