but I will disagree that a moot (not "mute" which is certainly a bad quality in a lawyer ;) ) ruling is in any way good. It means the Court doesn't address the merits of the issue at all because there is nothing left to rule upon. For example, if someone seeks an injunction to stop a foreclosure sale after the sale takes place, the court will simply rule it is moot. In my experience, a moot ruling is almost always foreseeable. Whether he foresaw it or informed others of that possibility are other matters.
But I just have to say it is inaccurate that one can take the moot ruling and use it as favorable authority for anything.