[roywiggins]

The original Turing test started by imagining you're trying to work out which of two people is a man or woman based on their responses to questions alone.

But supposing that you ran that test where one of the hidden people is a confederate that steganographically embeds a gender marker without it being obvious to anyone but yourself. You would be able to break the game, even if your confederate was perfectly mimicking the other gender.

That is to say, embedding a secret recognition code into a stream of responses works on humans, too, so it doesn't say anything about computer intelligence.

And for that matter, passing the Turing test is supposed to be sufficient for proving that something is intelligent, not necessary. You could imagine all sorts of deeply inhuman but intelligent systems that completely fail the Turing test. In Blade Runner, we aren't supposed to conclude that failing the Voight-Kampff test makes the androids mindless automatons, even if that's what humans in the movie think.