My point was more that before condemning the Indians, we should remove the log from our own eye.

It's getting there. Polygraphs are still useful to measure ~~psychological~~ neurological response, so we might not see them disappear. I could certainly still find it convincing if corroborated with a psych expert who understands how to read it (and when NOT to draw a conclusion). The idea of discerning a lie with any reliability with a machine and no access to any direct evidence is absurd, though.