What happens if the person states they wont tell the truth at a trial at the swearing in?

If a person states they won't tell the truth during the swearing-in process at a trial, it typically indicates that they are unwilling to take the oath required for testifying. This can lead to the court disallowing their testimony, as the legal system relies on honest testimony to ensure justice. Additionally, refusing to tell the truth can have legal repercussions, potentially resulting in contempt of court charges. Ultimately, the court may take measures to ensure that only truthful testimony is presented.