A car door analogy is weak, simply because I don't know enough about how they are designed and built. Maybe an artist goes to town, and then the engineers and i

A car door analogy is weak, simply because I don't know enough about how they are designed and built. Maybe an artist goes to town, and then the engineers and interaction team have to bend over backwards to make the concept work (probably a bad way go about making car doors!). Still my point is that aesthetics, functionality, and usability are all subsets of design (according to the author).