In this sense, they are like the unmentioned premises in abbreviated reasoning, which can go unmentioned because they can be taken for granted as generally acknowledged.
Ngalo mqondo, bafana nezakhiwo ezingakhulunywa ngazo ekucabangeni okufingqiwe, okungahle kuvezwe ngoba kungathathwa kalula njengoba kuvunyelwe ngokuvamile.