I remember reading a book by Vincent Bugliosi (who prosecuted the Manson murders) and he talked about circumstantial evidence. He said that often defense attorneys frame circumstantial evidence as links in a chain. If one link weakens or breaks the chain is broken. But he said he always likened circumstantial evidence to strands in a rope. Each individual strand may not be especially compelling or particularly strong on it's own, but when braided into a rope it becomes unbreakable. Even if one or two or several strands breaks, the rope still holds. As a skeptic about a lot of things I want evidence. For me, when you add all of these little pieces together -- some of them flimsy, some of them very strong -- what you get is a pretty strong rope. I do think most of the UFO sightings people have can be explained by non-extraterrestrial phenomena. But the rope still holds. I am almost 100% certain that within my lifetime we will have full public disclosure about extraterrestrial life. There's no way it isn't out there; the only question is whether it's been here. Seems more and more likely to me that the answer is yes it has.