As a designer by trade I tend to disagree with the idea that content and presentation are identical, or indistinguishable. They are deeply connected but they are not identical. You should not confuse the fuel for the engine, though you need both working in concert to make the vehicle go. I think, for example, of a poster I saw from Germany in the 1920s. I read no German and so could not understand its content but I could see how design and typography were used in that poster and how people in English-speaking countries had used similar design elements. Both the content and the presentation convey, but again that does not make them identical.
