Gödel, Escher, Bach An Eternal Golden Braid by Douglas R. Hofstadter

(Dana P.) #1

The fact that a symbol cannot be awakened in isolation does not
diminish the separate identity of the ~)'mbol; in fact, quite to the contrary: a
symbol's identity lies precisely in its ways of being connected (via potential
triggering links) to other symbols. The network by which symbols can
potentially trigger each other constitutes the brain's working model of the
real universe, as well as of the alternate universes which it considers (and
which are every bit as important for the individual's survival in the real
world as the real world is).


The Symbols of Insects


Our facility for making instances out of classes and classes out of instances
lies at the basis of our intelligence, and it is one of the great differences
between human thought and the thought processes of other animals. Not
that I have ever belonged to another species and experienced at first hand
how it feels to think their way-but from the outside it is apparent that no
other species forms general concepts as we do, or imagines hypothetical
worlds-variants on the world as it is, which aid in figuring out which
future pathway to choose. For instance, consider the celebrated "language
of the bees"-information-laden dances which are performed by worker
bees returning to the hive, to inform other bees of the location of nectar.
While there may be in each bee a set of rudimentary symbols which are
activated by such a dance, there is no reason to believe that a bee has an
expandable vocabulary of symbols. Bees and other insects do not seem to
have the power to generalize-that is, to develop new class symbols from
instances which we would perceive as nearly identical.
A classic experiment with solitary wasps is reported in Dean Wool-
dridge's book, Mechanical Man, from which I quote:


When the time comes for egg laying, the wasp Sphex builds a burrow for the
purpose and seeks out a cricket which ~he stings in such a way as to paralyze
but not kill it. She drags the cricket into the burrow, lays her eggs alongside,
closes the burrow, then flies away, never to return. In due course, the eggs
hatch and the wasp grubs feed off the paralyzed cricket, which has not
decayed, having been kept in the wasp equivalent of a deepfreeze. To the
human mind, such an elaborately organized and seemingly purposeful
routine conveys a convincing flavor or logic and thoughtfulness-until more
details are examined. For example. the wasp's routine is to bring the
paralyzed cricket to the burrow, leave it on the threshold, go inside to see that
all is well, emerge, and then drag the cricket in. If the cricket is moved a few
inches away while the wasp is inside making her preliminary inspection, the
wasp, on emerging from the burrow. will bring the cricket back to the
threshold, but not inside, and will then repeat the preparatory procedure of
entering the burrow to see that everything is all right. If again the cricket is
removed a few inches while the wasp is inside, once again she will move the
cricket up to the threshold and reenter the burrow for a final check. The wasp
never thinks of pulling the cricket straight in. On one occasion this procedure
was repeated forty times, always with the same result.^4

(^360) Brains and Thoughts

Free download pdf