Final answer:
To gather witness testimony, the person supplying the testimony should be an expert in the relevant field, there should be a consensus among experts, and the person's testimony should be non-biased.
Step-by-step explanation:
In order to gather witness testimony, several factors should be considered:
- Expertise: The person supplying the testimony should be an expert in the relevant field, ensuring their knowledge and experience make them reliable.
- Consensus: It is important to assess whether there is a consensus among experts in the relevant field on the question at hand.
- Non-biased: It is crucial to evaluate whether the person's testimony reflects agreement with the consensus of experts and if there is any reason to think they are biased.
These factors help ensure the credibility and reliability of witness testimony.