Consider the last time you sat down to begin a complex activity, such as writing a scientific article or crafting a persuasive letter to a colleague. When you started did you have, in your head, an exact outline of what you wanted to say and then transferred those ideas, verbatim, to your word-processing software? Or did you have a general idea of the topics you wanted to cover and, as you began writing, saw your text emerge as you typed and interacted with the software? In other words, did your final written document go directly from your brain



