A fact was a piece of truthful information.
History
In early 2006, the webmaster of Who is Doctor Who? wanted the police to "open their eyes to the fact there [was] more going on than they realise." (PROSE: Rose sighting confirmed [+]BBC webteam, Who is Doctor Who? (BBC, 2005).)
After the defeat of the Slitheen family on 7 March 2006, Mickey Smith (TV: World War Three [+]Russell T Davies, Doctor Who series 1 (BBC One, 2005).) wrote on his website the morning after, confessing that he had "been in two minds" recently, finding himself doubting the evidence, facts, and secrets he uncovered, upon rewatching it, although he was reassured by the emails he received, even though he sometimes deleted them, knowing vaguely what was in them. (PROSE: Hoax This! [+]BBC webteam, Who is Doctor Who? (BBC, 2005).)
In an interview hosted by Mickey for his website a week later, upon being asked by Mickey if he knew for a fact that the evidence left over was going to be cleared up and removed stored away from the public, Henry Van Statten stated that "our planet has been visited by more alien beings for as long as its been around." (PROSE: Henry Van Statten [+]BBC webteam, Who is Doctor Who? (BBC, 2005).)
In late 2006, as a journalist, Cathy Salt felt that she had a duty to report facts. (TV: Boom Town [+]Russell T Davies, Doctor Who series 1 (BBC One, 2005).)