Can rat people be ennobled? How do nobles learn skills?

Ant, rat and pig people cannot be ennobled. Current eligibility requires a bed-dwelling race and excludes summoned sprites, stone people and other ineligible identities. Elven residents differ from summoned sprites. Noble ability training uses the relevant books and training plans: research the books, have nobles write them at a research table, then assign books individually or use the age/quantity-based automatic plan. Children's schooling does not automatically train adult nobles in management.