In Abdulbaqui v. State, 728 P.2d 1211 (Alaska App. 1986), the Court explained that co-defendants' antagonistic defenses do not ordinarily require severance, and that severance should be granted only if the defenses are truly "irreconcilable" -- in the sense of being "mutually exclusive to the extent that one must be disbelieved if the other is to be believed". Id. at 1219.