Final answer:
A speaker considered well-informed, skilled, and knowledgeable can be described as having credibility. This is established through references to personal qualifications such as education, job, and community involvement. Credible speakers are more likely to persuade their audience because they convey expertise and authority.
Step-by-step explanation:
A speaker who is seen as informed, skilled, and knowledgeable about a topic can be described as having credibility. This credibility is often established when the speaker refers to personal qualifications, such as their education, job, community involvement, and thorough research on the subject in question. People are more likely to be persuaded by speakers who are credible because they are seen as experts with an authoritative voice on the subject.
For example, a historian speaking on a historical event, a scientist discussing a scientific theory, or a public speaker debating a social issue could each establish credibility by showcasing their in-depth knowledge, experience, and the professional tone in which they present information. This expertise can be seen among pundits and 'talking heads' on channels like CNN, MSNBC, and FOX News. It is the depth of their knowledge, the relevance of their experience, and their ability to communicate in an engaging manner that makes their opinions and commentaries respected and influential.