Commentary Inf XIX 54

Some have suggested that the condition of future knowledge alluded to by Farinata ([Inf X 100-108]) pertains only to the heretics; this passage would seem to indicate clearly that others, as well, and perhaps all those in hell, have some sense of the future but none of the present. Nicholas had 'read' in the 'book of the future' that Boniface would be on his way to hell as of 1303, and is thus now confused, as he expects no one else to pile in on top of him but Boniface.