> The fact that identical twins look similar suggests that most of the variation in facial identity is going to be driven by a heritable element. I don't see h

> The fact that identical twins look similar suggests that most of the variation in facial identity is going to be driven by a heritable element. I don't see how you get to that conclusion. If a set of twins inherited nothing from their parents they could still be identical. The DNA could be generated randomly and then duplicated. This is just a logic argument as clearly everyone inherits many things from parents.