How do you know which is your left leg?
Well, obviously, you learned at a very early age that that is the proper name for that bit of your anatomy
But if you close your eyes, how do you feel, (without touching) or know where your left leg is?
For reasons which I shall go on to explain, I think it is because you always know where your big toes are
If we assume that the you who knows this is located somewhere in your brain there must be some kind of messaging, circuit system which constantly lets you know AOK! We are still here