Good for you.
Now if only you'd direct the same level of diligence at educating yourself in the practices of critical analysis and informal logic, we'd all be a lot better off.
In these discussions, ufology, you often make a particular point of evoking "context." Similarly, the point we've all been trying to make is one of context.
This is not the year 1958, and as far as I know, none of us are engaged in the official study of UFOlogy on commission from the United States Air Force under Project Blue Book. Such a situation is an example of a particular
context.
Here's another, quite different
context. The current year is 2011. February 5, 1958 was over 53½ years ago. Project Blue Book no longer exists.
Within our current
context, the Cold War-era acronym "UFO" has long since entered the popular lexicon, and everybody understands exactly what one means when one invokes the term "UFO." There's simply no need, nor any justification to revert back to some archaic, disused military designation. Consequently, the "official" Project Blue Book definition is an irrelevant anachronism in the context of our current discussion.
As others have already pointed out, using that definition not only confuses matters, but it opens up a lexical gap which would require the creation of some new term to describe any unrecognized objects a person might see up in the sky (
unidentified flying objects, natch), which are precisely the phenomenon the term "UFO" was originally coined to represent.
So, to avoid all that utter and complete nonsense, we're going with the standard definition of "UFO," the one literally represented by the words designated in the acronym itself.
UFO == "Unidentified Flying Object"
Period.
Any further attempts at changing this very obvious definition will be regarded as a dishonest attempt to obfuscate literal meaning through the logical fallacy of redefinition.