belief-revision-covers-all-cases-uniformly

IN derived (depth 4)

The belief revision system handles normal beliefs and all edge cases (premises from absent justifications, asymmetric missing-node semantics, vacuously valid empty antecedents) through the same minimal mechanisms (outlist defeat and dependency-directed backtracking) — no edge case requires special-case logic.

Summary

The revision system is architecturally clean in a specific way: every edge case that could seem to need its own handler — premises without justifications, missing nodes, empty antecedent lists — is actually covered by the same two core mechanisms (outlist defeat and dependency-directed backtracking) that handle normal cases. This matters because it means the system's correctness argument is simpler than it looks; there are no hidden special-case paths that could harbor bugs or interact unexpectedly.

Justifications

SL — Uniform edge-case semantics mean the two minimal revision primitives never need special-case dispatch — edge cases are just ordinary cases

Antecedents (all must be IN):

  • all-semantic-edge-cases-are-uniform — All semantic edge cases — absence of justifications yielding premise behavior, absence of nodes producing asymmetric fail semantics, and empty antecedent lists satisfying vacuous truth — emerge from the same uniform evaluation rules without special-case handling, including the emergent disjunctive-over-conjunctive truth structure.
  • belief-revision-is-comprehensive-and-minimal — The system handles all forms of belief revision through two complementary minimal mechanisms: the outlist primitive provides a single reversible defeat mechanism for challenges, kill-switches, and supersession, while dependency-directed backtracking resolves detected contradictions by retracting the least-entrenched premise with minimal disruption.

Dependents

These beliefs depend on this one:

Details