Every group has a unique idempotent element: namely, its identity element.

A fine man, that Dunwody, yonder, commented the young captain, as they parted, and as he turned to his prisoner. We'll see him on in Washington some day. He is strengthening his forces now against Mr. Benton out there. A strong man—a strong one; and a heedless.

argent:

Patrick: Because classy sophisticates like us should not stain our lips with cursing. SpongeBob: Yea verily!