King, you still have not asnwered my basic question, based on your statements of how science is done and truth considered (your post #1447). I'll ask it again. Do you think that N-rays, phlogiston, and the canals of Mars were true between the time they were "discovered" and the time they were discredited?
When the first diver saw the first bioluminescent fish, it was a rumor or an anecdote. The anecdote may have been true, but the discovery was open to reasonable doubt until some way was found to test it. This might have been either finding the thing that glowed and discovering that it was not a fish, or finding a fish that glowed. In the case of something that actually exists, it is likely that eventually it will be confirmed or falsified, since one might imagine that the first person (or maybe the tenth, who knows?) to spot such a fish would make some other observations, such as its size, its depth, the area in which it was found, and thus be able to guide further exploration. If nobody can ever do this, then no one can ever truly know, any more than one can know if another person says God spoke to him. This is how science sorts out the difference between reality and faith,error and fraud. This does not seem to have been possible with UFO's. I wonder why not?
Of course, this thread will never settle down the way you like it, because the initial post and its initial premise do not actually express what you are looking for. It is, if not dishonest, inaccurate and fatally vague. What you really are looking for, and perhaps ought to start a new thread for if you have the will, is more like this:
let us assume for the moment that E.T. of a particular sort exist. The assumed E.T. are technologically advanced beings, once resident on earth, and correspond to the myths of ancient gods. It is stipulated for the purposes of this thread that their existence is supported by evidence, so the quality of that evidence is not a subject of discussion. If you wanted them to come back to earth, how would you go about this? Disallowed in this thread are questions about the veracity of the E.T. themselves, suggestions that the E.T. are something other than those specified, and discussions of whether we should wish them back at all.
This would correspond, more or less, to the post-hoc specifications you have inserted into this thread, and might allow you, in good faith, to discount or disparage the many serious and not so serious, but polite and to-the-point responses you've gotten here