Final answer:
Testimony can provide support for beliefs about reported propositions, even if it is unreliable or false. Evaluating the credibility of the source is crucial in determining the validity of testimony.
Step-by-step explanation:
Testimony plays a crucial role in social epistemology as it involves believing what others tell us. However, the reliability of testimony is important to consider. Even unreliable or false testimony can provide support for beliefs about reported propositions, but it is crucial to evaluate the credibility of the source.
Models tackling willful disinformation often address this issue by considering factors such as the source's history of lying, biases, track record, conflicts with other testimonies, and motives. By critically evaluating these factors, we can determine the credibility and justification of testimony.