For example, the Navis Nobilite appear as a Scholastic Lore whilst the Adeptus Arbites, Astra Telepathica, and Mechanicus appear as Common Lore. The Navis Nobilite also turn out to be a Common Lore as well.
On the surface they all seem like they same sort of thing: knowledge about a specific Imperial institution. What is it then that differentiates between Common Lore and Scholastic Lore?
Why is it Navis Nobilite are in both Common and Scholastic but the others are only in Common?
EDIT: It almost seems like Scholastic Lore should be another level of Common Lore rather than completely seperate. Like for instance knowing general information about the fire brigade vs being a member with skilled knowledge of the fire brigade.
It just seems a little obscure given the choices of Lore avaialable.
hellebore