Kennedy talked a lot about visual literacy and questions why we aren't taught to be visually literate when we are taught quantitative and written literacy. Because 90% of what we take in as human beings is visual, we should know and understand how to communicate visually.
Solid communication occurs when the form and function of an object is understood just by looking at it. On page 2 in White Space is not Your Enemy, there is a section which touches on form and function. A light switch is a simple case that can relate to this. I think most anyone who has ever used a light switch knows that if you want something to turn on, the switch is to be flipped upward and for the light off, the switch is flipped downward. It really bothers me when the switch is reversed, which doesn't happen often, but still. What's even worse is when there's a switch that doesn't appear to make anything in the room turn on or off (I had this predicament in my last apartment and it was awful).
