Lie detection via facial cues &#x2F; body language strikes me as the sort of thing best done with a neural network: thousands of tiny noisy cues each with very weak correlations that need to be combined with solid statistics.  Humans can&#x27;t process this many cues at once and bias drowns out the signal, but a smart NN hooked up to a powerful camera is another story.<p>The &#x27;active&#x27; method in the article is useful, but has a limitation: you need to be able to ask questions in real-time.<p>Collating the answers and automating truth evaluation would be a pretty interesting AI problem.  It should also be possible to have an AI formulate the statistically optimum questions to ask, Akinator style.<p>P.s. That would be the killer app for Google Glass, right there.  Would also increase chance of being thrown out of pubs by 1000%, but hey.