The same question came up on Reddit (in the agressive know-it-all tone typical of Reddit (http://www.reddit.com/r/programming/comments/8ufl1/gray_code_at_the_pe

The same question came up on Reddit (in the agressive know-it-all tone typical of Reddit (http://www.reddit.com/r/programming/comments/8ufl1/gray_code_at_the_pediatricians_office/) http://www.reddit.com/r/programming/comments/8ufl1/gray_code...) when I first posted this blog article. So I asked the pediatrician, and the answer (http://www.reddit.com/r/programming/comments/8ufl1/gray_code_at_the_pediatricians_office/c0b3lhv http://www.reddit.com/r/programming/comments/8ufl1/gray_code...) was surprising: >I was back at the office today and I asked one of the senior doctors about it. She said that the manual stadiometers were always giving inaccurate readings and that they constantly had to have the service guys in to recalibrate them. The electronic stadiometer, she said, is much more reliable. >"But it's a really expensive stadiometer," I said. >"The service calls on the manual stadiometers were costing us a fortune." >The radio connection to the portable readout is a red herring. They had the display mounted on the wall right next to the stadiometer. I asked if they ever took it down and moved it around; the doctor said they never did. >So there's your answer. It's nothing clever, but it's totally reasonable, and it's nothing you could deduce from your armchair. This is why it's important to suspend judgment of someone's actions when you don't have any direct knowledge of their situation. Hope this helps.