Final answer:
When assessing the validity of evidence or the identity of the applicant, consider the expertise of the person supplying the testimony, the consensus among experts, and potential biases.
Step-by-step explanation:
When assessing the validity of evidence or the identity of the applicant, there are several factors to consider. Firstly, it is important to evaluate whether the person supplying the testimony is an expert in the relevant field. This can be determined by examining their experience, education, and knowledge in the area. Additionally, it is crucial to assess whether there is a consensus among experts in the field on the question at hand, and if the person's testimony aligns with this consensus. Lastly, it is essential to evaluate whether there is reason to believe that the person may be biased.