premise: a sheriff has a <mask> to arrest a criminal
hypothesis: the best context for <mask> here is Of or pertaining to that side of the body in man on which the muscular action is usually stronger than on the other side; -- opposed to left when used in reference to a part of the body; . Also applied to the corresponding side of the lower animals.; but not That which one has a legal or social claim to do or to exact; legal power; authority.