<< " ..... I have not seen a convincing argument that he was capable of writing the plays."
There are .... um ... how shall I put this so as to not offend ... um .. the plays?
That's always been my response. As a fan of Marlowe, I'd buy into the theory that he wrote the plays if it wasn't Shakespeare, but if Marlowe or Bacon were capable of writing the plays, why not Shakespeare himself?