The statement provided seems to imply that most public speeches are primarily persuasive in nature and that they typically include a strong rhetorical question to guide their conclusion. However, not all public speeches necessarily have a persuasive purpose; some may inform, entertain, or inspire an audience without a strong emphasis on persuasion.
If you are looking for a more accurate characterization or definition related to public speeches, it would be more accurate to say that public speeches can serve various purposes, including informing, persuading, entertaining, and commemorating, among others.
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