For example, there could be schools of medicine based on specialties. And while doctors would refer to each specialty by name, commoners would not make the differentiation (or know how to) and refer to them all as "Blood Letters" or somesuch.
For example, there could be schools of medicine based on specialties. And while doctors would refer to each specialty by name, commoners would not make the differentiation (or know how to) and refer to them all as "Blood Letters" or somesuch.