They ' ve got the cement and the cheap labor , what you waiting for Trump ? <| sep |> I ' ve read through it . The paradox starts with the idea that if some fact is not known , we must assume it is knowable that it is not known . But in knowing that the fact is not known , we must know that the fact is a fact , and thus it must be known . Absurd . My first idea is that you can solve the problem by introducing time . A fact may be unknown at some instant , and known at the next . The trick , then , is to say that with every statement of knowledge , it is implicit that this knowledge is at some point in time . You can ' t just say this or that is known you have to say this or that is known , at this time . If you keep that in mind , the paradox disappears . Some fact A is not known at time T . It must be knowable that A is not known at T . But this knowability doesn ' t just concern time T , it concerns every single moment in time , and even every possible moment in time . At some future date , say time U , it is no longer a problem to know that A was not known at T . We aren ' t at T anymore , so knowing A isn ' t a problem . The paradox is gone . I hope that makes sense .