It’s important to realize, though, that there’s a real difference in what you’d expect to see if organisms were consciously designed rather than if they evolved by natural selection. Natural selection is not a master engineer, but a tinkerer. It doesn’t produce the absolute perfection achievable by a designer starting from scratch, but merely the best it can do with what it has to work with. Mutations for a perfect design may not arise because they are simply too rare.
So God's design is to create "Kinds" of animals that have a lot of variety in their DNA to help them adapt to the envrionment. What a fantastic design. It adds a lot of beauty and practicality to the world as we know it. But what it does not add is new information. The info was already there. I think where he is going is that he is going to point out some scnearios in which creatures aren't perfect and then use that as evidence that nat selection is also not perfect and therefore not part of God's design. I
