In the 2nd line of the Serendia quests (started by [Crossroad] Silence, We're Done Here! quest), there is a quest called Al Rhundi, the Mortal, which should give the knowledge Al Rhundi, the Mortal (https://bdocodex.com/us/theme/5917/). However, I cannot get the knowledge from dialog, and the quest itself gives the knowledge of the boss (https://bdocodex.com/us/theme/4109/). According to the Codex/Database, HerVano Tito should give the knowledge when the quest is active, but he does not. Currently there is no way to get this knowledge.