What is the burden of proving that a defendant did not "appear" at an arraignment hearing?

As with all appeals, we must presume the evidence supported the court's judgment, and it is appellant's burden to affirmatively show otherwise. Appellant "has the burden of affirmatively showing error by an adequate record." (Goehring v. Chapman University (2004) 121 Cal.App.4th 353, 369.) In this case, the record is simply inadequate to demonstrate that Quher did not "appear" at the arraignment hearing on October 20, 2008.