“What are your favorite prototyping tools? (…) I think paper and pencil are really the most important, and the reason for that is that you can use them without any difficulties except for the fact that most people these days don’t know how to draw anything. In the good old days we used to teach engineers how to draw. I don’t mean draw a beautiful picture, I mean like draw a rectangle for a screen. Teaching them how to draw was essential. You and I could sit and draw, and then stick our drawings on the wall or on paper.” (Ambidextrous Magazine Issue 9)