Final answer:
The MR/No condition is a legal rule related to character evidence. It restricts the admissibility of character evidence in court cases, with an exception for impeachment of a witness. This condition ensures that character evidence is used for appropriate purposes in a legal proceeding.
Step-by-step explanation:
The condition you are referring to is commonly known as the "MR/No" condition in the law of Evidence. It applies to the admissibility of character evidence in court cases.
In general, character evidence is not admissible to prove that a person has a certain disposition or propensity to act a certain way. The MR/No condition means that such evidence is not admissible, UNLESS it is being used to impeach the credibility of a witness.
For example, if a witness's character for truthfulness is being attacked, evidence of prior acts that demonstrate untruthfulness may be admissible under the MR/No condition. In that case, the character evidence is allowed because it goes to the issue of the witness's credibility, rather than to prove that the witness acted in a certain way in the present case.