Repetition is a technique used to emphasize a point by repeating words or phrases. Repeating an idea several times makes the speaker sound more confident and can influence the audience to believe the idea is true, even if it is not factual. While repetition can be an effective persuasive technique, it can also be deceptive or manipulative if used to reinforce a false contention without evidence. Famous speeches like Martin Luther King Jr.'s "I Have a Dream" speech and Winston Churchill's "We Shall Fight on the Beaches" speech used repetition to emphasize their central messages and convince the audience of their visions.