Take Operation Bluebook, the purpose of the operation was to disprove or provide doubt to ufo's for public consumption. After the government used every trick in book including swamp gas, 5% of the reports were classified as unknown. So...the incidents were not swamp gas, Venus, a person drunk, a mentally ill person, and/or a mirage.
Yes, some of the ufo reports remain UNKNOWN even after investigation. However, unknown means exactly that, and so far, noone has been able to point towards a ufo to likely be of extra-terrestrial origin. And also, if it WAS identified as such, it would no longer be a ufo...
And why do you and so many others diss on swamp gas? Have you seen what kind of weird effects swamp gas can cause? Fireworks and special effects worthy of a blockbuster Hollywood movie at best.
What were those incidents that the Air Force could not explain away? When all other rational answers are eliminated....they only answers left are government black program(s) or extraterrestrial ufo(s).
No, there´s thousands of other possible answers. You make strong assumptions based on nothing.
So throw out the possible crazies and the gold diggers/hoaxers, a person is left with millions of people's testimony about incidents that have happened over the years. That's enough evidence in court for a person to be put away for rest of their life a thousand times over.
Exactly what is it with "unidentified" that you do not understand?
If someone went to court and said "well we have all this stuff, we´re totally sure it´s evidence and really totally obvious, we just don´t have a clue what it is and we can´t say for sure if it really is evidence, but since we have so MUCH of it we want you to deliver a conviction anyway, yeah that sounds good", they would loose any license to practise law they ever had and probably get thrown out, or quite possibly get thrown in jail for messing with the court...
You´re doing your own personal version of the MUD theory of public relations, throw enough shit at the media and hope enough of it sticks to your "enemies" to cripple them.