I try and read body language and micro-expressions. If someone scratches their nose, they are unconsciously telling a lie. (covering ones mouth is too obvious.) Also, if you imagine that person stood beneath a clock, then ask a question ~ liars will look up at 'Ten to Eleven ' before answering. If they are sat down, arms crossed reads as being defensive when questioned, and you may see displaced irritation if a crossed leg begins tapping, swinging, and points towards the exit door meaning that they basically want to flee the situation. The problem with KP is that she probably believes her own lies and is hard to gauge. Good luck to you very observant fellow tattlers in unravelling her utter bollox. x