> A counter example is a physical button on manufacturing equipment. It’s huge, tactile, and labeled. I know I could press it, but that doesn’t necessarily help

> A counter example is a physical button on manufacturing equipment. It’s huge, tactile, and labeled. I know I could press it, but that doesn’t necessarily help me understand what happens when I click it. On the other hand, you can be very sure you won't press it unintentionally if you stay away from it, and the difficulty in pressing it provides a hint of how big of a deal it is to press it. Membrane buttons, on the other hand, can very well implement flat or hidden buttons that one might press by accident.