There should be no way for a designer to not be able to figure out why their machine produced what it did given enough debugging.
The machine's designers must not be able to explain how their original code led to this new program.
If I'm not mistaken, this has already happened when evolutionary algorithms were applied to hardware design: some slides. The author of the program has no idea how the resulting circuit worked.
My behavior is that of someone who's tired of debunking baseless and libelous accusations of fraudulent bullshit lies from Lonny Eachus, who is dishonestly posing as a woman named Jane Q. Public. This shouldn't be hard for Lonny to understand:
"@RatbagsDotCom You're a liar (which you have just proven beyond doubt), and present yourself as something you are not. You're a hypocrite." [Lonny Eachus, 2012-02-04]
Fast, cheap, good: pick two.