You are right - no, it doesn't. The article mentions Gould and Lewontin's 'spandrel' theory as one a framework to understand non-functional explanation, then pr

You are right - no, it doesn't. The article mentions Gould and Lewontin's 'spandrel' theory as one a framework to understand non-functional explanation, then presents a spandrel explanation for the chin. You might be interested in reading their original paper, "The Spandrels of San Marco and the Panglossian Paradigm: A Critique of the Adaptationist Programme", available from http://faculty.washington.edu/lynnhank/GouldLewontin.pdf http://faculty.washington.edu/lynnhank/GouldLewontin.pdf .