[drdoom]

This.

I have given similar demos. You first explain what you are going to do. Before the demo, they go all go into "no, it is impossible. I have been in this business for 20 years. Blah blah." You demo it, and once in a while, they get it, their jaws drop and they appreciate it. But mostly, it is a suspicious disbelief, followed by adversarial challenges where they insist you disclose everything under the covers right then and there.

I have even heard this: If this was possible, why hasn't IBM done it?

Sometimes, it is pretty depressing.