truth what cannot be known - mlichtenstein/13thAgeSK GitHub Wiki
The existence of unknowable truths has been contemplated since at least the Age of the Sky Empire, studied seriously since at least the Age of Cascading Hours, assumed since at least the Age of Imperial Hubris, and proven to exist since at least the Age of Death Triumphant.
The Philosopher Poet studied the prior scholarship regarding unknowable truths extensively, and concluded that the unknowability of unknowable truths is necessarily imperfect: even the most unknowable truths can in fact be known, but only for a very short time and by a very small number of beings. To the best knowledge of this scholar, there are no cases of this being useful.