He has argued that the components of systems such as the blood clotting cascade, the immune system, and the bacterial flagellum are so complex and interdependent that they could not have evolved from simpler systems.
Argumentou que os compoñentes de sistemas como a fervenza da coagulación do sangue, o sistema inmunitario, e o flaxelo bacteriano son tan complexos e interdependentes que non puideron evolucionar a partir de sistemas simples.