You've extended a useful, incomplete heuristic into a perfect, useless tautology. No, I just pointed out that the list of my parent poster is somewhat arbitrar

You've extended a useful, incomplete heuristic into a perfect, useless tautology. No, I just pointed out that the list of my parent poster is somewhat arbitrary. I'd put Twitter, Facebook, Pinterest, Dropbox, Evernote, Instagram all in the second category, because they exist only in digital life. My atom life is complete without Facebook for instance. Whether I use Facebook or not makes not much difference. But booking a place via Airbnb has a direct (and only) result in the atom world: I now have a social acceptable reason to stay at a stranger's place. And furthermore: There's no other way to book that stranger's place except for maybe walking up to random strangers and asking them if they offer me a couch for 50 bucks. I think the more useful definition of an "atoms company" is one that directly tells you which atoms to move and where to move them. I mostly agree. But then it also depends if you take action in the atom world based on information you gathered from the electron world or not. And if you go down this route, the whole heuristic is completely nonsense, because people take action based on information gathered from electrons all the time.