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Yes... in fact, in my opinion I don't think they work

** NEW ANSWER **

Like any other piece of equipment, a polygraph instrument can have malfunctions and these malfunctions will prevent the exam from being conducted. If you are asking whether a malfunctioning polygraph can give incorrect test results, the answer is no. The examiner will either be unable to administer the exam at all, or some data will not be able to be collected adequately. - Michael Martin (President, Global Polygraph Network)

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14y ago

What else can I help you with?