An irrelevant escape.
(irr-escape) → acl2::irr
This can be used as a dummy value of the type.
Function:
(defun irr-escape nil (declare (xargs :guard t)) (escape-hex nil))
Theorem:
(defthm escapep-of-irr-escape (b* ((acl2::irr (irr-escape))) (escapep acl2::irr)) :rule-classes :rewrite)