Know-it-alls are people who think they know everything and are often seen as arrogant or annoying. PEDANTS, Smarties, SWAMIS, and SAVANTS are all terms used to describe know-it-alls. PEDANTS are people who are overly concerned with details and rules, while Smarties are people who are very intelligent and knowledgeable. SWAMIS are people who are wise beyond their years and have a deep understanding of the world, and SAVANTS are people who have an extraordinary ability to remember facts and figures.