Final answer:
It is true that when offering your own insights in a speech, you should provide a source qualifier to establish credibility and context. Signal phrases help introduce quotations and should also be balanced with your own analysis and original thoughts.
Step-by-step explanation:
When providing your own insights in a speech, it is true that you should provide your own source qualifier. Doing so helps to establish credibility and provides context for your audience, ensuring they understand the relevance and foundation of your insights. This is akin to using signal phrases when introducing quotations, which inform the readers of the source and purpose of the quoted material. A source's value comes from how well it fits your purpose, and while direct quotations offer concrete evidence, you should also ensure they are supplemented with your own analysis and insights to avoid drowning out your own voice in your writing.
An exemplary writer maintains an objective voice and finds a balance between quoting and original thought. Such a writer is adept at presenting source information, analyzing claims, synthesizing different viewpoints, and offering original insights. This balance ensures the audience is given both the necessary background information and the writer's own valuable perspective.