Final answer:
A witness may not testify to a matter unless evidence is introduced sufficient to support a finding that the witness has knowledge of the matter.
Step-by-step explanation:
In order for a witness to testify to a matter, there must be evidence introduced that is sufficient to support a finding that the witness has knowledge of the matter. This means that the witness must have information or facts about the matter that make their testimony reliable and trustworthy.
To determine whether or not a witness has knowledge of a matter, several factors can be considered:
- Is the person supplying the testimony an expert in the relevant field?
- Is there a consensus among experts in the relevant field on the question at hand?
- Does this person's testimony reflect agreement with the consensus of experts?
- Is there reason to think this person is biased?
Overall, the goal is to ensure that the witness's testimony is based on factual information and is not influenced by personal bias or unsupported claims.