Design and the Singularity: The Philosopher's Stone of AI?

Much discussion on the singularity is based on the assumption that the design ability of a human can be transferred into an AI system, then rendered autonomous and self-improving. I argue here that this cannot be foreseen from the current state of the art of automatic or evolutionary design. Assuming that this will happen 'some day' is a doubtful step andmay be in the class of 'searching for the Philosopher's Stone'.