What is the fallacy called when a conclusion is drawn from a single instance rather than substantial evidence?

The concept of deriving a conclusion from a single instance, rather than a broader set of evidence, is known as "Selected Instances." This fallacy occurs when someone uses an isolated example to support a sweeping generalization, bypassing the necessity for more comprehensive data that could provide a clearer and more accurate perspective on the issue at hand. By focusing on a singular case, the broader variability and complexities of the matter are ignored, leading to potentially misleading conclusions.

This fallacy is especially pertinent in arguments where anecdotal evidence is presented as definitive proof, suggesting that the example given is sufficient to support a general rule without acknowledging the lack of larger supporting data. The reliance on a single instance can distort the reality and misrepresent the topic being discussed, making it crucial to seek out representative samples and thorough evidence before concluding. Approaching conclusions with a broader viewpoint helps avoid this oversimplification, enhancing the validity of arguments presented.