Comment by 3455434687

If the fist evolved to punch: http://www.latimes.com/science/sciencenow/la-sci-sn-human-fi... ...it's maybe conceivable that the chin evolved to resist chokes? Choking can be very effective, and tucking your chin is an important defense: http://www.grapplearts.com/finishing-the-rear-naked-choke/