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The classic advice given by Dale Carnegie for public speaking is to say what you have to say only once is False

Who is Dale Carnegie ?

Dale Carnegie is an American writer who developed courses in

  • self-improvement
  • salesmanship
  • corporate training
  • public speaking
  • communication and interpersonal skills

Some of his quotes on public speaing includes

  • “Only the prepared speaker deserves to be confident.”
  • “Tell the audience what you're going to say, say it; then tell them what you've said.”
  • “A talk is a voyage. It must be charted. The speaker who starts nowhere, usually

The classic advice given by Dale Carnegie for public speaking to say what you have to say only once is false

See more here on Dale Carnegie advices: https://brainly.com/question/20522891