Debugging test 4:
 - 20 times, pick any random part of my code and write a tiny "eg" that
   exercises that bit. Does the output make sense?

20 "egs" containing various random pieces of the NOVA code (mainly from
lisp/guess/guess.lisp, lisp/tricks/lib.lisp, and lisp/xomo/coc-lib.lisp) were
compiled as a set called "debug4" in debug4.lisp.  The output of all of the "egs"
make sense and return values that are expected.