What is a condition that allows the defense to call witnesses at a preliminary inquiry?

The ability for the defense to call witnesses at a preliminary inquiry hinges on the necessity to verify or challenge the evidence presented by the Crown. During a preliminary inquiry, the court assesses whether there is sufficient evidence to proceed to trial. This process allows the defense to test the credibility and the reliability of the prosecution's evidence.

By calling witnesses, the defense can provide counter-evidence, establishing doubts and portraying a different narrative that may lead to a conclusion that the case should not proceed. This function is crucial as it ensures that the proceedings are balanced and that the defendant's rights are protected. Thus, the correct rationale for allowing the defense to call witnesses is specifically to verify the Crown’s evidence, which can directly influence the judge's decision to commit the case for trial or not.