The reason why we settled on the polygraph and not something else is because of William Marston. He invented the early polygraph after noticing his wife’s blood

The reason why we settled on the polygraph and not something else is because of William Marston. He invented the early polygraph after noticing his wife’s blood pressure rose when she was angry. He also created Wonder Woman who carries a whip that makes people tell the truth. In the 1930’s he wrote a book advocating for the use of the polygraph by law enforcement. Gillette hired him for an advertising campaign to “prove” they had better razors. The public started to believe in it’s effectiveness which allowed it to start coercing confessions. We might as well be determining guilt and innocence with a block of Kryptonite or by flipping a batarang. It’s ridiculous that it is still allowed.