DYasha wrote:I've been watching this show the past few weeks. There are some interesting shows, like the one on Polygraph machines and why they don't work. Police agencies still use them even though they are very unreliable. There is a very good reason why they are inadmissible in a court of law.
DYasha wrote:Polygraphs simply don't work, yet a lot of cops and investigators still rely heavily on them. Serial killers pass them all the time. And blowhards like Nancy Grace makes a huge deal over people who fail polygraphs or refuse to take them. Countless lives have been destroyed by that machine. People have lost their jobs, marriages have been broken up, and serial killers pass the test and are no longer prime suspects.
DYasha, do you have any personal reason for disliking them so much? You sound like someone with a grudge, who is crusading for a reason.
The sad fact is that live witnesses are even
LESS reliable than polygraphs. And yet, we still use live witnesses, in trials. Without, I might note, even attempt at all to evaluate how good their powers of observation and memory are (which could be done, for example, by finding out whether they actually understood and can accurately remember stuff they saw on recent TV shows, movies, etc).
The other fact that DYasja declines to mention is that a WHOLE LOT of private companies use polygraphs, with
generally good results, to screen employees, and to cut down on theft and other crimes against the company. Private companies do that, because about 80-90% of the time, they usually work reasonably well. Indeed, there is a LARGE class of inept and amateurish liars that give up quickly, and admit what actually happened, when told that they did not pass a polygraph test.
Can polygraph tests be faked, fooled, and fudged? Sure, some of the time. That's like saying that boats sometimes sink, and sometimes boats kill people. Sad, and true. So, should we stop using boats, altogether? No, because most of the time, they DON'T sink. And, they do a LOT of good.
Why do courts not allow the use of polygraphs? The hidden answer is, they would cut down on the amount of control that lawyers (who ALSO sometimes lie, and deliberately mislead, and hide facts, and fudge answers) would have, over a trial, and over clients. And, that would cut down on the amount of money lawyers make. And, after all, courts are run by (and for . . .) lawyers, so they are damned well going to use every reason they can, to oppose the use of anything that would reduce THEIR control over a trial.
Final comment -- there is a new type of brain imaging called "functional MRI". It is almost absolutely 100% foolproof, in being able to tell when people are lying.
So -- in all seriousness, try to answer this question -- why aren't lawyers, courts, and legistalures pushing hard to get it adopted and used, as the new standard type of lie-detectors in court proceedings, especially in murder cases?
You can damn well bet that just about any and every nations' intelligence and spying agencies have already started using it, quietly, without calling any attention to what they're doing in secret.
As for Penn & Teller -- I love 'em. They're great. And BTW, Teller also spoke, at the end of their movie.