You have always had difficulty learning and retaining information, and know very little about the world beyond the obvious and what pertains to your profession.
Effect: Choose one Knowledge skill. You cannot attempt untrained Knowledge checks with any other Knowledge skills, even if the check’s DC is 10 or lower. If you have access to a library that covers a specific Knowledge skill, you may attempt an untrained Knowledge check with a –2 penalty.
Pathfinder Player Companion: Quests & Campaigns © 2013, Paizo Publishing, LLC; Authors: Amanda Hamon and David N. Ross.