The GP is skeptical that one can go from A, a chance interaction between two systems, through a continuous uninterrupted, robust, repeatable chain of unguided interactions, and arrive at Z, the placenta. An organ whose function and elegance is unrivalled by anything we as a species have made with logic and thought. And why should he not be skeptical, everything we've practically achieved in terms of technological progress has been the product of mind and intelligence, any claims to be able to do the same thing without that should be scrutinised very closely.