[bookofjoe]

Excellent explicit acknowledgment that software — bits — are not the same as the real (aircraft in flight, e.g.) world — atoms. As a physician, I am routinely amused by comments on HN implying that the human body is equivalent to software, and that medical procedures are the same as steps in execution of a program on a computer. Which would be true, except for one thing: every meat-based computer — aka body — is uniquely wired, with unknown connection patterns causing identical inputs to produce wildly varying outputs. As yet, there's no app for that.