Physically speaking, the rainbow is a continuum of photons sorted by frequency, but perceptually it is a display of sharply distinguishable colors. Moral of the lesson: nature presents a continuum, but we perceive in categories.
Last week's post introduced W. Tecumseh Fitch's new text, The Evolution of Language, as a book that every reader of this blog needs to own or at least have nearby, but one which seems blind to its own assumptions. This week I want to discuss why, despite my disagreement with its underlying assumptions, I still believe it is a must-have reference. Briefly, like the honest scientist he is, Fitch lays out the facts, so even if you disagree with the conclusions, it is still extremely useful.