The sixth sense, in short, enables those who are the master of it to decode "tells", a word borrowed from the gaming tables, which might be shorthand for telltale signs, as, for example, when a chap who has just picked up four aces starts subconsciously scratching his wallet. If we mastered the art of deciphering tells, then we would be able to read the mind of our boss, or anyone else whose mental processes might be of interest.