Rhetoric is a form of human communication that uses symbols to induce social action. It has a unique status as both a social and practical art. Rhetoric can take the form of narrative, dialectic, or rhetoric as a method of argumentation. As a method, rhetoric differs from dialectic in that it deals with concrete, specific questions regarding contingent issues aimed at popular persuasion and action, rather than generalized propositions for criticism. Rhetoric exists both as a practice of expression and performance, and as an intellectual method of investigation and planning how to express ideas.