[FOCI]
Many recursions are places in which some are cultivated as the sole masters of scholarly knowledge, steeped in minutiae of unknown usefulness. These are the plumbers of lost and forbidden secrets, as well as practical if intellectual work. Their inquisitive natures and sometimes annoying need to spew forth “facts” have made them a grudgingly valued ally of certain groups taking action within medieval recursions. Knowledge is power, particularly when the mind warping secrets you have access to relate to some world eating monster trying to leverage your home recursion into a gateway to Earth.
Also, you recall a somewhat related but interesting fact!
Also, you recall a related an incredibly useful fact!
You've studied at a university or other place of learning within this recursion and still have access to its reservoirs of knowledge when in the right cities. Additionally, you are trained in a knowledge skill of your choice.
You enjoy an asset on rolls related to analyzing or recalling information about a natural phenomenon.
You are trained in an additional knowledge skill of your choice.
You gain a Contact long-term benefit representing a mentor in academic circles.
You may use a knowledge skill of your choice in lieu of the Healing skill. When you do so, add 1d6 to the amount healed.
You are now specialized in the two knowledge skills you've gained through this focus.
You learn a forbidden fact or piece of lore after a day's work doing research in a library or other source of information. This knowledge is dangerous and the GM should offer you a number of intrusions on your way to using it.
GM Intrusion: The book you're quoting was completely wrong about this topic, providing you with a wealth of false information.