[From Shannon Williams (960228.1330)]
Bill Powers (960227.0600 MST) replied to Chris:
Rick and Tom and I and others have had great difficulties in
proving experimentally that multiple levels of control even exist. The
main difficulty is that you can always collapse a multiple-level control
system model into a single system with equivalent properties.
Wonderful!
We have some anatomical evidence of clear levels of control, but only
at the bottom one or two levels. Information about what higher centers
in the brain do is almost nonexistent; it's still mostly guesswork.
You need a mechanism to implement the control... How about a mechanism
that can generate "learned" perceptions from current perceptions?
-Shannon