Sexual reproduction depends on an irreducibly complex core of components for its success. But can we really credit a gradual evolutionary process for this remarkable system? On this ID The Future, host Andrew McDiarmid continues his discussion with Dr. Jonathan McLatchie on why sex is the queen of problems for evolutionary theory and why instead it bears the hallmarks of a system governed by forethought and engineering. Dr. McLatchie covers two more components and explains why they are beyond the reach of a Darwinian process. This is Part 2 of 3.