so if i become a teacher and forge an experiment by using a fixed temperature termomether to proof water boils at 100ยบ and an student finds out should that disprove to him the whole thermodinamics?
you would be surprised what a good poker player can read into your expressions
edit:
id say non verbal subcouncious expresions like nervous tics or blushing is a first step into a telepathic mankind where as blushing lies cant be hiden, i wonder what would be like a society without lies