Trivia submission for On Swift Horses rejected... why?

Contribution Confirmation #250503-162230-756000 I submitted a trivia item for On Swift Horses, which centers on gay and lesbian relationships. On my first try, the item was rejected because it "Does not meet contribution guidelines." After reviewing the guidelines carefully I concluded they must have thought I was stating an opinion rather than fact so I added a line to clarify, and cited an additional reference (for a total of three). My item was rejected again, this time because they were "Unable to verify." Here's the item I submitted, in its final form: "At the beginning of the film, Julius tells Lee and Muriel he was discharged from the Navy six months early and did not receive mustering out pay. No further explanation is given, but it seems he received either a dishonorable discharge for committing a crime such as theft, or an "undesirable" discharge because he was gay; later in the film, Julius says during his Navy service he was both a thief and a (slur for homosexual). Mustering out pay was guaranteed by the U.S. Congress in the G.I. Bill to any war veteran who was discharged "under conditions other than dishonorable." Undesirable discharges were officially termed "neither honorable nor dishonorable" but the Veterans' Administration denied all benefits to those discharged as homosexuals, on the premise that they had been discharged "under dishonorable conditions." The discharges were given to anyone who was determined by psychiatric examination to be homosexual or to have "homosexual tendencies," whether or not the person was known to have committed any homosexual act." And my cited references: "Denial of G. I. benefits to homosexuals is discussed in detail in Allan Berube's 1990 book Coming Out Under Fire and Margot Canaday's 2009 book The Straight State: Sexuality and Citizenship in Twentieth Century America. See also: https://en.wikipedia.org/wiki/Blue_discharge" This is a well-documented piece of history that strongly impacted the lives of many people but is unknown to most even within the gay community, and that specifically relates to one of the film's main characters in a way the film does not make clear. I provided references to two highly regarded history books that discuss the matter in detail, as well as a Wikipedia page that covers the major points of my submission. I'm afraid I don't understand why "Unable to verify" applies here. What more would I need to provide to make this item "verifiable"?