Each concept is read twice: whether the approach carries it over, and whether the approach's own sources claim it. A concept that the approach claims but does not carry over is a shortfall. A concept that it neither claims nor carries over is an omission, which marks a gap in the field rather than a failure of the work.
Segmental autonomy
PartialShortfall · partially preservedDefinition (Arend Lijphart, Democracy in Plural Societies, 1977)
In a deeply divided society, each group governs its own internal affairs (e.g., its schools and its family law) within its own sphere, instead of everyone living under one uniform rule.
Analysis
Each delegating principal sets the permissions and scope of its own agent, and each digital service provider decides the terms on which it admits agents at all. There are therefore many spheres with their own rules and no step that merges them. However, each sphere is an account or a website held by one individual or one firm, rather than a group governing its internal affairs. Lijphart's segments have an internal life and a claim to self-rule. Here, the unit of autonomy is whoever happens to own the credential or the server.
Choice-of-law rule
AbsentOmissionDefinition (Friedrich Carl von Savigny, System of the Modern Roman Law, 1849)
When several bodies of rules could govern the same case, an explicit rule decides which one actually does and states the reason. Without such a rule, "different rules for different groups" gives no answer for the cases that fall between groups.
Analysis
A credential states what one principal has authorized its own agent to do. It never says which of several bodies of rules governs a case, because the approach does not consider several sets of rules at all. Its subject throughout is the scope of a single grant and the chain of accountability behind it. When a service provider's conditions and a delegating user's grant point different ways, the framework refuses the agent at the point of entry rather than allocating the case. The audit trail records the configuration that was applied, but not a reason why one order governed the case rather than another.
Mutual veto and proportionality
AbsentOmissionDefinition (Arend Lijphart, Democracy in Plural Societies, 1977)
Decisions that affect all groups require every group's consent, and representation is proportional to each group's size. As a result, no segment can simply be outvoted on what matters most to it.
Analysis
No group consents to anything here, and nothing is proportional to anything. A service provider can refuse an agent and a user can narrow a grant. However, both are unilateral refusals inside one's own sphere rather than a requirement of consent for decisions that affect everyone. Those most exposed to agent activity (the people an agent contacts or transacts with) appear in these papers as parties to be protected, and never as parties whose agreement is needed.