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Irr-uid

An irrelevant unique identifier.

This can be used as a dummy value of the type.

Function: irr-uid

(defun irr-uid nil
  (declare (xargs :guard t))
  (uid 0))

Theorem: uidp-of-irr-uid

(defthm uidp-of-irr-uid
  (b* ((acl2::irr (irr-uid)))
    (uidp acl2::irr))
  :rule-classes :rewrite)