This is, basically, a quick patch to handle the Einsteins and Mozarts of a society, who go above and beyond the limits of what they should be able to do with their comparatively short lives.
A Genius is handled in the same fashion as a Society, mostly to conserve rules. Over the centuries various attempts have been made to organize subsets of geniuses (Mensa, for example), but none have been wholly successful.
Rules:
A genius gets a free +1 to any single Profession. So a middle-aged Einstein could have Researcher(Stringtech) at 6, costing only 35 years (the price of getting it at 5).
A genius must take their chosen profession as one of their core values (with the corresponding bonus for rolling on that profession).
Most geniuses are members of the old worlders, cargo cults, or mechanicans. Higher cognitech tends to swamp out personal ability, making everyone (or no one) a genius.
Balance notes:
With just a +1 to a single profession (and die bonuses from the associated CV), the genius is somewhat weaker than other societies. It is intended more as a way to express certain types of characters, and to give a bit more flexibility for defining NPCs, then as a powerful society.