Dr. Craig is a liar.

[RoadRunner79]

Do you think there's a difference between common descent, and common descent evolution?  You and your siblings share a common ancestor.  Your children will all be descended from you.  This, despite the differences between you and your siblings, and any differences between your children.  No matter how far apart they drift from each other, they will be linked to you and to each other, and to your own parents, by common descent.  There are a plethora of ways in which this can express itself as a demonstrable metric...but honestly, you need only have children and be a child of someone yourself to understand the proposition entirely.  

(I referred to your ongoing description of a god, a being constrained by logic....a cause of some things, but clearly not all things - such as logical impositions and boundaries to which it is inferior)

What if all my kids look like the mailman?

I believe you are thinking about someone else concerning the other conversation...  but I don't see being logical as inferior.