		Search-engine friendly clone of the ACL2 documentation.

Defun-sk-queries

Defun-sk-quantifier-p

Note that these are in the "ACL2" package.

This is an ordinary std::defenum.

Function: defun-sk-quantifier-p

(defun defun-sk-quantifier-p (x)
       (declare (xargs :guard t))
       (or (eq x 'exists) (eq x 'forall)))

Theorem: type-when-defun-sk-quantifier-p

(defthm type-when-defun-sk-quantifier-p
        (implies (defun-sk-quantifier-p x)
                 (if (symbolp x)
                     (if (not (equal x 't))
                         (not (equal x 'nil))
                         'nil)
                     'nil))
        :rule-classes :compound-recognizer)