In everyday language, puffery refers to exaggerated or false praise. Puffery serves to "puff up" what is being described. In law, puffery is usually invoked as a defense argument: it identifies futile speech, typically of a seller, which does not give rise to legal liability. In a circular manner, legal explanations for this normative position describe the non-enforceable speech as a statement that no "reasonable person" would take seriously anyway.