original_query: What is a metaphor and how is it used in rhetoric?
query: What is a metaphor and how is it used in rhetoric?
answer: A metaphor is a figure of speech that refers to one thing by mentioning another for rhetorical effect.  In rhetoric, metaphors are used to create understanding and knowledge, making learning more pleasant and transferring characteristics from a known to a less-known subject. They enhance description, increase perception and understanding, and can even create new ideas.  Metaphors can persuade an audience by making an argument more vivid and memorable.