Patterns of activity may be fuzzed symbols
The states of activity produced by the olafactory system may correspond to rough approximations of classical discrete symbols.
John Barnden, 1987.
The "distinctive stereotype of activity" (p.174) that Skarda and Freeman correlate with the inhalation of a learned odor may corerspond to the symbolic output of the olfactory systerm, which the brain then uses in classical symbol-manipulation style. It is consistent with AI to allow that these symbols "embody a certain amount of fuzz" (p.174).