I have no problem at all with the USAF definition, other than I think it could be clarified to make it clear that it is not necessary that a UFO be forever unidentifiable in order to be called a UFO.
If an object seen in the sky is unidentified, it is technically a ufo. If it is subsequently identified, then it would seem to no longer be a ufo, even if it was considered a ufo earlier. So there's a temporal indexical aspect to this. Ufo ascriptions seem to be functions of their context.
then let me also say that it doesn't blow my mind that some people report seeing things in the sky that they can't identify. And that's all that UFOs are.
That slippy-slides over the underlying issue, namely
what is really being seen?.
Certainly if we knew that in every case, then there would no longer be any ufos. They would all be identified.
But as what?
You seem to me to want to sneak in another unstated premise: That whatever is responsible for any and all ufo reports will turn out to be familiar and mundane. You seem (however implicitly) to want to argue that there isn't (and can't be?) anything new, extraordinary or fundamentally unexpected happening in reality.
That's what the argument of this thread is really about. It's where I think that you and I differ most profoundly.
Using your terminology, as soon as something is identified as a "craft" it is an "IFO", not a UFO. In other words, you believe all of your UFOs are really IFOs, because you believe that all of them are "craft", at the very least. You just want to call them UFOs and then complain when I or the USAF uses that term as it was intended.
I agree that MR doesn't use his vocabulary very precisely. Calling them "craft" in the sense of vehicles risks biasing our conclusions when we don't know what they are.
Every UFO investigation must remain open until it's positively identified as something because until it is identified there is an unsolved mystery. I mean, if you like, you can wind up the investigation with an indefinite conclusion, saying "Case closed. We have no idea what this thing is." What you can't do, unless you're dishonest, is to pretend that you know the UFO is craft in the absence of sufficient evidence for that conclusion.
Nor can we assume that all of them would ultimately fit nicely into our pre-existing classification categories if only we had enough information. To do that is to rule out the possibility of anything unexpected popping up. Either MR and River's way or your way, it still looks like confirmation bias.
The only thing I deny is that you - or anybody else - has presented sufficient evidence to justify the conclusion that aliens are visiting Earth.
I think that there's evidence that's
consistent with the extraterrestrial theory, but as you say, nothing even remotely conclusive. My own view is that the extraterrestrial theory has a relatively low probability. I remain unpersuaded.
But something else seems to be happening here:
The pro-ufo faction seems to me to be implicitly fighting for the possibility of
transcendence (in the sense that reality around us arguably exceeds our current understanding). The anti-ufo faction seem to want to believe that all of reality fits nicely and without remainder into their existing conceptual boxes.
A place for everything and everything in its place. The problem with that is that for as long as there have been humans, those humans have believed that they had everything figured out (except perhaps for a few loose ends here and there). And up until today, that assurance has always proven to be wrong. (That's the so-called "pessimistic induction" in the philosophy of science.)
We need to keep an open mind.
Yours is a faith-based belief
So is yours, so is yours.