@abge, well, I probably shouldn't have gotten involved at all, because to be honest, I really don't care much. I just responded because, as an outsider (mostly) to the thread, geofram's line of reasoning didn't seem right to me.
As for what I'd rather you do.... I don't know, Draug said something noncommital that seems like it would work. Or how about,
"We have looked into it and are taking no action at this time."
The "at this time" there sounds pretty conclusive actually, because almost every BS form letter has that phrase, lol. So I don't think people would read too much in, but it also doesn't sound like you're blowing somebody off. Or how about,
"Our inquiry yielded no evidence sufficient to draw conclusions of cheating."
Or I don't know. lol. Like I say, I should probably stay out of it.