Darwinists say that evolution is explained by the selection of phenotypic traits (heritable biological properties) by environmental filters, but the effects of endogenous structure, such as gene regulatory networks, can wreak havoc with this theory.

So say cognitive scientists Jerry Fodor and Massimo Piattelli-Palmarini in a new book, What Darwin Got Wrong.

“Pigs don’t have wings, but that’s not because winged pigs once lost out to wingless ones,” they say. “And it’s not because the pigs that lacked wings were more fertile than the pigs that had them. There never were any winged pigs because there’s no place on pigs for the wings to go. This isn’t environmental filtering, it’s just physiological and developmental mechanics.”