What is an example of insufficient supporting evidence?

The choice that exemplifies insufficient supporting evidence involves citing a single, questionable source against strong evidence. This scenario highlights a critical issue in argumentation and persuasion. In effective writing or speaking, particularly in academic and professional contexts, claims and assertions should be supported by credible and reliable sources. When only one source is utilized, especially if it is deemed questionable, it weakens the overall argument because it does not stand up to scrutiny when comparison is made to other more robust and credible evidence.

Strong arguments typically rely on a variety of sources that provide a well-rounded perspective and establish trustworthiness through multiple attestations. A solitary source, particularly one that lacks credibility, can lead to doubts about the validity of the claims made, undermining the strength and persuasiveness of the argument being presented.

In contrast, providing ample research data (the first choice), using analogies to clarify concepts (the third choice), and effectively including historical examples (the fourth choice) represent methods of supporting arguments with sufficient and substantial evidence. These approaches enhance the persuasiveness of the argument by grounding it in reliable and relevant information.