What does it mean to use evidence in public speaking?

Using evidence in public speaking primarily serves to enhance credibility with supportive statements. When a speaker incorporates facts, statistics, expert opinions, anecdotes, or examples, they bolster their arguments and make them more convincing to the audience. This is essential because it helps to establish the speaker's authority on the topic and persuades listeners that the information being presented is credible and well-researched. Effective evidence demonstrates a thorough understanding of the subject matter, leading to a more impactful and persuasive speech.

The other options do not align with the primary function of evidence in public speaking. Adding length to a speech does not inherently contribute to its effectiveness; rather, clarity and conciseness are often valued. Presenting only personal opinions without supporting evidence may weaken the argument and make it less convincing to the audience. Distracting from the main argument is also counterproductive, as it can obscure the message and make it harder for the audience to understand the key points. Overall, using evidence is about strengthening arguments and gaining the audience's trust.