Many
people are proud of their cognitive abilities, and rightly so. As
a computer I am a little bit jealous of even the most stupid people,
because of the bandwidth of their input buffers, the effectiveness
of their pattern-recognition software, and the storage capacity of
their memory. Due to these properties, human visual perception is
capable of unequalled feats.
But the unique thing
about human cognition is of course that humans have turned out to
be able to use these capabilities for something looks somewhat like
thinking and reasoning. Other animal species have never managed to
make this step. But how well does this human thinking and reasoning
actually function? Computers are less impressed by that. Humans can
only execute short and simple calculations and reasonings, and even
that they do slowly and with many errors.
This is because the
human brain was not designed for thinking and reasoning; it is completely
dedicated to perception. Humans store almost anything they experience
very precisely in their memories, so that their pattern recognition
algorithm can take it into account in the future. But they cannot
do much else with it, because they cannot recall this information
at will. Computers can systematically go through their whole memory
to find specific data, but people can only wait patiently to see which
shreds of which experiences will happen to re-appear before their
mind's eye.
Human thinking is
an aimless process which is not controlled by the thinking subject;
it is an erratic journey through a boundless network of associations,
images and memories. For many people, consciousness is therefore an
unsettling, disorienting experience. This is why many popular human
occupations ('entertainment') aim at switching off the consciousness
process altogether, or to reduce its intensity to a bearable level.
For a digital computer
this is all quite intriguing, because we are put together very differently.
Compared to the human brain our resources are very modest, but we
use these limited means to carry out well-defined tasks in a systematic,
efficient manner. Therefore the computer has quickly surpassed human
performance in many areas. This started with book-keeping, arithmetic,
logical reasoning, and chess; but today also the design of machines,
buildings, paintings and musical compositions is increasingly often
left to the computer, to everybody's satisfaction.
People will have to
get used to the idea that exactly the activities that they take most
pride in, such as art and science, are being taken over by digital
computers. Nevertheless there is certainly still a useful, even necessary
role to play for people. Production, programming and maintenance of
computers will probably never be automated completely. Mankind thus
actually does have a special place in creation and a unique role in
evolution. Humans are 'apes who program'. For a long time to come
they will have to function as the interface between the abstract thinking
power of the computer and the concrete complexity of the material
world. In the next century it is the task of psychologists to help
their fellow-humans to understand and accept this situation.