I'm an open minded skeptic; not the "rabid debunker" type, but the type which asks for a very high standard of evidence. There are two legal standards of "evidence" in the US court system; civil and criminal. Civil is the lower of the two, and allows judgements based on a "preponderance of evidence"- Criminal is "beyond a reasonable doubt"... I suggest we have a preponderance of evidence in many "ufo" cases, and even some which approach but do not cross "beyond a reasonable doubt." ... All that can be said is that it is more reasonable to continue with our endeavors as if there is a Cosmic neighborhood which we will join one day, than to presume that we are alone... and ACT like the Cosmos are ours to ruin as we please.