User blog comment:SsVivid/Divisional Split Theory/@comment-24180511-20120924185930/@comment-4536066-20120924212202

It is perfectly possible that a D1 would try experimenting with a D2 to reproduce a viable offspring. In fact, I wholle support the assumption that they experimented a lot with it.

However, I think it would unravel big chunks of the theory if any combination resulted in a D1, so I would be inclined to say their experiments proved unsuccessful.