Major Section: EVENTS
WARNING: We strongly recommend that you not add axioms.  If at all
possible you should use defun or mutual-recursion to define new
concepts recursively or use encapsulate to constrain them
constructively.  If your goal is to defer a proof by using a
top-down style, consider using skip-proofs; see the discussion
on ``Top-Down Proof'' in Section B.1.2 of ``Computer-Aided
Reasoning: An Approach.''  Adding new axioms frequently renders the
logic inconsistent. 
Example:
(defaxiom sbar (equal t nil)
          :rule-classes nil
          :doc ":Doc-Section ...")
General Form:
(defaxiom name term
         :rule-classes rule-classes
         :doc          doc-string)
where name is a new symbolic name (see name), term is a term
intended to be a new axiom, and rule-classes and doc-string are as
described in the corresponding documentation topics .  The two keyword
arguments are optional.  If :rule-classes is not supplied, the list
(:rewrite) is used; if you wish the axiom to generate no rules,
specify :rule-classes nil.
 
 