[From: Bruce Nevin (Fri 931022 16:11:54 EDT)]
A slight amplification:
If a copy of r can be used in the imagination loop within this ECS, then
it can equally feasibly be used
elsewhere (that is, in some ECS that takes a category perception as input)
as a category perception that categorizes
all of the possible combinations of lower-level signals into the PIF of
this ECS such that p = r in this ECS. The categorization is built into
the structure of the hierarchy. You don't need a separate level.
Bruce
bn@bbn.com