I mean, if you feel the need to explicitly claim that it's true, then the only reason you'd do this is that if you didn't, then people would assume the content is either false or misleading... which could only happen if either a) it is false or misleading, or b) your past behaviour has been dishonest, and leads people to that conclusion.
See also: Project Veritas, and numerous others.
The problem with this^^ kind of thinking is that it is false. However, if the believer in this kind of thinking thinks it's true, he should "explicitly claim that it's true," which might make some people think that it is false.
Claims of explicit truth by the proponent, doesn't necessarily make what is being claimed false. Such claims might scare some people away, but it makes others who are interested examine the "white papers," or at least examine if there are any "white papers."