Having worked with robots

humans are interesting in the way they continually self-calibrate.

Just spent the morning setting up some tests on the robotic system here, and was considering the way internal movements are calibrated and can drift. Living things are changing constantly as they grow, age, wear and damage. Yet almost everyone could touch a finger to the tip of their nose first go, or shovel food into their mouths without difficulty. Based on my experience with robotics, you wouldn't want to be pushing sharply pointed objects toward a small opening of uncertain size and location.

Quite remarkable really.