In Chinese, there is a term called 矛盾. Individually, the word 矛 means spear and the word 盾 means shield. The story goes - once upon a time there was a merchant selling spears and shield. "This spear can pierce through any shield!" he says, "This shield can block any spear!" he says. An astute member of the audience asks "What happens if you hit your shield with your spear?". 矛盾 is the term for "contradiction".

So let me ask now, what happens if you get the robot hand to play with another robot hand?