Без заголовка
Боюсь что в экспертных системах это распространенное явление :).
Вот цитата из одной формальной системы (ACL3)
We expect that a user who
* has a bachelor's degree in computer science or mathematics,
* has some experience with formal methods,
* has had some exposure to Lisp programming and is comfortable
with the Lisp notation,
* is familiar with and has unlimited access to a Common Lisp
host processor, operating system, and text editor (we
use Sun workstations running Unix and GNU Emacs),
* is willing to read and study the ACL2 documentation, and
* is given the opportunity to start with ``toy'' projects before
being expected to tackle the company's Grand Challenge,
will probably take several months to become an effective ACL2 user.