Quote Originally Posted by CFTraveler View Post
BC they're reported sightings. Those who aren't seen won't be reported.
But I'll play- maybe the craft is of the kind that breaks some sort of barrier, and when it does, it interacts with our atmosphere and lights up. That would be what we're seeing, but maybe it's not all the time.

I didn't even think of that , so if one looks it that way , i.e that "unseen crafts aren't sighted" that means there are UFOs in our atmosphere , not visible to us , now lets take this possibility and posit that if add this unknown quantity of UFOs and assume it to be the same frequency of appearance of visible UFOs then the number of UFO actually present goes up by 50% more.
That means the UFO phenomena is twice as common as we think or assume it to be.

If the fireball or globular light UFOs constitute 80% then the remainder of 20% is made by metallic type UFO ......and then going still ahead are the invisible UFOs , coming and going entirely un-noticed (lets assume for argument's sake that they have very superior stealth technology)

mind blown