EXPLAIN (MAYBE DIAGRAM) THE RESULT OF TRAINING

   report *mk_xxx_report_from_hypo(examples *exams,
                                   avset *query,
                                   ivec *in_att_nums,
                                   ivec *out_att_nums,
                                   char *params,
                                   char *hypo)

An optional function that gives a report
(which may include graphics and/or text) as
to the contents of the hypo.