Lawyers are advocates, but tribunals must be able to rely upon counsel not to knowingly make material false statements. An attorney may argue that a witness is unreliable, that evidence supports another interpretation, or that precedent should be distinguished. Those are legal arguments.
An attorney may not knowingly tell the court that a witness said something the witness never said, claim that an order exists when it does not, invent rule text, or cite a fictional case. This duty applies equally when attorneys use AI, templates, search tools, or prior filings. If the computer invents United States v. Convenient Result, the lawyer remains responsible for the unfortunate moment when the judge searches for it.
