Walking is an extremely complex operation. [...] decades ago
computers were programmed to
stimulate their nerves and get the legs to move sufficiently to ride a
tricycle. Walking, however, is still out of the question despite
decades of improvement in computers.

Flying an airplane straight and level on instruments? I believe the
first autopilots were built in the 1930's. That gives you some feel
for the relative complexity of the tasks.


Standing (and walking) involves an inherently unstable situation. Flying a
(well designed) airplane involves an inherently stable situation. Compare
walking to flying a helicopter on instruments. That gets you closer.

Jose


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