As a father of a 2 year old, I think I know approximately what those two air traffic controllers must feel like. So many things need to be repeated over and over again.

It’s only natural that a little kid must first learn how to listen, and I expect things to improve only slowly and gradually, but it is really amazing how little folk can generate an almost impenetrable force field of ignorance. I can be 10 cm in front of his face and loudly call him by his name, but if he doesn’t want to, it seems he doesn’t even perceive somebody being there.