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One of my college professors was adamantly against Polygraphs, he made the case that over time it causes sociopaths to collect at whatever work address requires them because they can pass effortlessly and normal people on average get stung by false positives.

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I used to think this, but learned it filters for three modes:

1. The average person who hesitantly wishes that the examiner will supportively pursue establishing the true state of his/her personality and the World at large.

2. Someone entirely lacking empathy, unable to value the examiner as someone seeking truth.

3. Those who effortlessly pass, every time.

I think the reason three-letter-agencies maintain such expensive theater is to discover and protect #3.

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