Evolution as Carpenter: Scientist Concludes Repetitive Elements "Are an Important Toolkit"

I'm not an expert carpenter, but if I know what needs to be built I'll eventually get there. It may not be beautiful, but given a blueprint I can build a structure.

What if I didn't have that blueprint, though? What if I had no idea what needed to be built -- no notion of where the task was headed? Furthermore, what if I had no knowledge of structures in general. Just randomly cutting wood and pounding nails probably would not end well. This is the elephant in the room for evolution, for ac...