[ddtaylor]

I watched at Derbycon multiple times someone that could make a polygraph test do whatever he wanted, otherwise he was a murderer that murdered himself and it all happened before he was born. The test was being administered by a long time veteran polygraph operator who had recently retired.

[tptacek]

I don't know what that means, because a polygraph by design tells the polygrapher whatever they want it to.

[wedog6]

I believe it was the subject of the test who could make the polygraph reading show whatever they wanted, even though it was being administered by an experienced operator.

[the_af]

I think the point is that, since polygraph readings are pseudoscience, it's always the interrogator who picks what they "mean". If this is true, a smart test subject cannot mislead them, since there's nothing to mislead, as the polygraph is just a pressure technique and it means whatever the interrogator needs it to mean.

[c22]

If the demonstration was performed in some blinded protocol then perhaps there was more room for ambiguity in the results than usual.