‘In any case, even those who profess to deny the validity or the objective reality of the true-false distinction continue to maintain, without apparent embarrassment, that this denial is a position that they do truly endorse. The statement that they reject the distinction between true and false is, they insist, an unqualified true statement about their beliefs, not a false one.
This prima facie incoherence in the articulation of their doctrine makes it uncertain precisely how to construe what it is that they propose to deny. It is also enough to make us wonder just how seriously we need to take their claim that there is no objectively meaningful or worthwhile distinction to be made between what is true and what is false.’
Frankfurt, Harry G. (2006) On Truth. Alfred A.Knopf, New York.