Eigenlogik in German means that a subsystem has its own set of rules determining its phenomenological behavior. E.g. in sociology, a social group of humans shows a group behavior based on rules/laws of psychology. You can't derive it from the underlying physical laws of atoms and molecules that comprise humans. So an Eigenlogik often occurs in emergent systems.
The German eigen- as a prefix in English is quite common. Eigenvectors, -matrices.
Is there a special analogon or should one use simply eigenlogic, maybe intrinsic/immanent/inherent logic?