[Chuck Tucker (2001.0419a.1238)]
In my discussion of "stop signs earlier" today in response to [Bruce Gregory
(2001.0418.1510)] I made a mistake. Stop signs are eight-sided (Octagon)
rather than a six-sided hexagon and they come in different sizes. On my run
today I noticed two different sizes: one 2 foot wide and another 4 foot wide.
I also noticed a sign the tells you that a "stop sign" is down the road
yonder. This sign is square but mounted on a post so that one corner is
pointing up while the other is pointing toward the ground. Its color is
yellow and it has the shape (Octagon) of a "stop sign" on it with the shape
painted in red and a black arrow shape in the corner pointing upward. If one
takes the sign literally one would look to the sky (a sunny sky) for a
"stop sign" but I read it as saying a "stop sign" is down the road yonder (or
"a piece").
On another matter. I noticed in [Bruce Gregory (2001.0419.0930)] in reply to
[Dick Robertson (2001.0419.0400CDT)] he, Bruce, said: "But I am unable to
identify the control circuits involved in identifying a sunset. They may be
there, but despite considerable effort, I can't find them. I can simply
postulate that they exist, but I don't know what the gains me. it makes sense
that we create perceptual input function, and I doubt that anyone would argue
the case. But as Bill seem to agree, there is no reason to assert that these
perceptions wind up as reference level in control systems. This is really the
only point I was trying to make."
It seems to me that Bill could identify a "sunset" as a 'configuration'
(third level) when he states: "Visual configurations can be what we term
objects. If one looks around, he can perceive his surrounding as sensation --
colors, edges, shadings, points -- but it is difficult to avoid noticing how
these sensations cling together to make forms. These forms are highly
invariant with respect to many kinds of sensation-changes, even those that
occur when the object-configuration rotates or become nearer or father away
(Power in B:CP p. 125)." Even though Bill uses "physical objects" as examples
of configuration I don't see any reason that a "sunset" or "sunrise" could
not be a configuration. As for the relationship of the 1st, 2nd and 3rd
order systems and their position in cerebellum, see Figure 9.1 in B:CP, p.
117.
Regards,
Chuck