RandFan indicated that he believed I had demonstrated with
this post that machines can not do (now) what humans do.
Then he asked the wrong question (for his purposes), originally. But his was the question I answered, and appropriately.
In this act of correcting himself, then, RandFan informed me I had not demonstrated that machines will not ever do what humans do with my example of Tesla's visualization and invention of his alternating-current motor.
RandFan's original question had nothing to do with a demonstration of how machines will not ever do what humans can. I never would have answered a question concerning the possibility or impossibility of machines someday doing what humans do. My example of Tesla was not meant to answer the question of whether machines will someday do what humans do. Yet my quite appropriate answer to the simple question of what is it that humans do that machines don't was not accepted as I was told it didn't demonstrate how machines will never do what humans do.
As though it were meant to.
This is the context in which I asked RandFan if he now wanted me to explain why no machine will ever do what humans do (a knock off of Tesla's performance). For the first time I was
actually addressing the question of the possibility/impossibility of future machinery doing what humans do. A question I found completely meaningless.
I responded to a question I found completely meaningless by asking the (logical) question: shouldn't the burden of proof be on your proposed idea (that it is not impossible that a machine will someday do what humans do)?