You might pride yourself on your poker face, but there would be no way to hide from a skull-probing EEG helmet being developed by Veritas Scientific. The device takes advantage of a well-known medical response called P300, which causes your brain's voltage to drop a split-second after you put a name to a face or object. Simply by showing you a slideshow of different images, interrogators could tell whether or not you recognize a particular individual -- or maybe that LTE-connected
