If you want to find wilier race by common sense,
then you have just narrowed your searching area.

There is no UFO and also there is no alien,
at least not in common mind nor reference.

If you want to be sure of unusual thing such as aliens or UFOs,
then you have to think about it from an unusual way of thinking.

There were three motives that brought invaders crossing the oceans to discover America. Those were gold, gospel, glory. There are four motives that bring the alien crossing the heavens to discover planet earth. Those are gold, gospel, glory, gene.

When we do stargazing, we stare at the stars...and many other things which we have presumed commonly as stars.

If you begin to find the alien by using common sense, then you have just narrowed your searching area.