[drilldrive]

I cannot see how spandrels would be particularly controversial, though you need to have the right perspective of such. I believe a spandrel in theory to be the potential minus the solution at hand; in certain problem spaces a spandrel may be present in the optimal solution. This is not to say a spandrel is useless, in that removing a spandrel with reference to some solution from the potential alters the problem space, thus in the probabilistic theory of evolution you would encounter a different spectrum of outcomes.

I would see non-overlapping magisteria to be more controversial, however.