. . . What stands out as something of an obfuscated part in LtCol Corso's account are the "filing cabinets and Nut-file" he, General Trudeau, and Senator Strom Thurmond often referred to during their time. . . One must understand something of what maintaining secrets entailed in intelligence circles then and how they're carried over into to today's policies and procedures. . .
Sources and methods of intelligence gathering are not discussed nor are they to be found throughout this thread on purpose or in LtCol Corso's, The Day after Roswell. . . The intelligence agencies actively securing secrets of the US are known for their story telling where the gist of maintaining secrecy is concerned and that strategy continues in play today on purpose – They make no apologies for sounding strange, idiotic, or even as if lying or incomplete since the need-to-know is usually up front with any written or verbal correspondence which is a given. . .
Need-to-know is a paramount requirement with information flow and material handling pertaining to research and development. That hasn't changed despite several significant data breaches over the last decade. Compartmentalization of information and material handling remains very effective despite where there have been breaches as any one data part lost to common knowledge does not necessarily bring down or expose the rest of the secrets that are related or attached. It's meant to frustrate the most avid of investigators and irritate the doubters to where such pursuits are eventually given up or postponed indefinitely to say little about how tiresome and resource demanding investigation often is already. Consider that ones' adversaries can be very crafty in how they steal data or classified information when it is not meant for them in the first place. . .
In such instances it becomes little more than what I call a word-wrestling-match using the usual – The lengthy, the linear, and imprecise language conundrum, as I call it. . . At best, one continues with a great debate sometimes unknowingly embellishing parts of the narrative to suit purposes of print and publication in an effort to explain, thinking one is helpful in doing so. . . Silence is best. . . Not everything written can sound like an encrypted Ian Fleming novel and still be entertaining by design. . .
In some ways, the "Nut-file," X-Files, circular files, have a similar meaning in that they refer to a means of depositing and / or disposing of information. This methodology is not anything new. . .
You're right though, LtCol Corso did not tell all and was probably still under strict measures of secrecy as well as knew better than to do so. Many players in the world are not trustworthy any more than the world a safe place. I suspect only he still knew the details he kept quiet about. He knew of the difficult time one could have firsthand with various agencies. It was part of the post war mentality then given the destructiveness of new weapons. If one were to look at this information flow business from a different point of view such as from a prosecutorial point of view, for instance – What one says can be and will be used against the sayer of said words (classified information or data). If sworn under an oath of secrecy one is bound under the terms and laws that that oath of secrecy is enforced. In a way, that's an additional means of obfuscating narrative or as you suggest, not publishing unadulterated truth.
Grant Cameron has had some time to construct his fast talking narratives. Whether it satisfies him having embellished some of what he portrays as believable as several folks casually assert, is another matter. I wouldn't know. . . Grant brings up several important issues to consider, though, as do Nick Pope, Stan Freidman and others during the years of their investigative efforts. One is constantly subject to rebuttals and threats when data cannot be supplied in support of what that person tells as being the truth as they know it and without deliberately trying to mislead – their truth, in other words. Words often do not do many topics justice as the terms available do not quite describe what is witnessed and experienced or what is still sensitive, but can be undermining to others charged with still keeping secrets. . .
You mention "believe," yet for those who know certain things firsthand they do not have the cumbersome and frustrating mental overhead of believing, disbelieving or doubting as they know without those three mental irritants and obstacles.
You mentioned some doubt about LtCol Corso's promotion to Col – I suspect that that nomenclature of Col is similar to Sergeant or Commander or Admiral or Airman or Private or Seaman or Petty Officer, for instance, as in each of these there are multiple levels in each and the shortened term is often used. Whether that is grounds for mistrusting the individual I wouldn't know. I don't have access to Army personnel files nor do I have the need to have access, either, to official records where some aspects of them were classified or could be checked on a whim. . .
Doubting some of what was published in Corso's book is not anything new as there are obvious measures taken toward maintaining secrecy given that he was an intelligence officer during some difficult periods of US history just as LtCol Jesse Marcel Sr maintained as long as he did. A historical perspective helps to understand why there was a cover-up perpetrated in the first place. . . Take dogma and doctrine practiced in general across time and across the globe that some folks call flat or how the universe once put all celestial bodies revolving around planet earth. Finding out differently did not go over very well then – People were tortured, burnt alive, or exiled when their views put forth. Cultures today may seem more sophisticated, but are just as lethal and nasty, as ever, when it comes to the status quo being upset or threatens to undermine levels of control . . .Again, not anything new. . .
In any case, because compartmentalization of need-to-know information is so broad and currently practiced one is likely to get regularly frustrated with internal belief mechanisms one has adopted. . . It's one of the reasons why there's such a push toward confirmation and disclosure measures. . . Language confirmation and disclosure is limited no matter who has the megaphone to speak let alone in what capacity and authority of representation they assume. . . Curiosity is not always enough to gain secret access or for it to be given easily. . .
One of the angles of investigative pursuits into this phenomenon that is often eluded is what do the other beings do or think or react and why don't they land on one's front lawn – say hello in one's native language – allow a cell-phone video taken to be posted – or something similar to resolve this doubting uncertainty for the vast majority of folks that surrounds this unusual business of their existence and presence?. . At any rate, it does not seem over by a long margin. . .
I maintain, like many others, Knowledge is power – Power to overcome ignorance. . . Overcoming ignorance responsibly is easier said than done – to each their own gifts. . .