The task is to train on the 194 (97 x 2) I/O pairs
until the learning system can produce the correct output for all of
the inputs. The time required for learning is then recorded. For
back-propagation systems, the time is typically recorded in
``epochs''. Each epoch includes one training presentation for each of
the 194 points in the training set. An output is considered to be a
logical -1 if it is in the lower #tex2html_wrap_inline3225# of the output range, a +1 if
it is in the upper #tex2html_wrap_inline3227#, and indeterminate (and therefore incorrect)
if it is in the middle #tex2html_wrap_inline3229# of the range.