Comment by _huayra_

I remember reading that book when it clicked how frustrating the doors at my grad school uni could be: they had what is clearly a "pull" handle on both sides, but it only opened one way. They just added signs that said "Poussez" (push in French) on the push side because clearly no one thought about the design before installing it! It's unbelievable in the decades since that building my office was in was built, no one thought "hey let's put plates on this side so you CAN'T pull".