Or else, perhaps the entire reason they are here is to evaluate how isolated groups of humans respond to things that are clearly outside normal explanation as preparation for when they go public in a few decades. (Are we prone to "shoot first" and "Ask questions later?") What Would Gort Do?
The obvious THIRD explanation is that if we are seeing occasional lit saucers, there must, de facto, be hundreds of stealth saucers observing our reactions to them! Or, if you will, the complete lack of evidence of these SuperSaucers is the very evidence that they must exist!
You see? Absolutely NOTHING is beyond explaination for a True Believer!
>>>>>the complete lack of evidence of these SuperSaucers is the very evidence that they must exist!<<<<<<
Change!
Yes we can!