Classification research / edition 2026.10
Regime reconstruction case notebook
One small ledger, four different reasons a classification can change.
A revised score crosses the growth boundary
Reconcile the March fixture before and after a revision without calling the later label a better forecast.
A late release is not a zero score
Follow the May fixture through a missing input, its first delayed release and a later revision.
Boundary abstention survives an uncomfortable example
Explain why the June score pair receives no quadrant at its original cutoff, even though a later revision supplies one.
A withdrawn observation must stay withdrawn
Preserve an explicit null revision instead of reviving an older value that produces a convenient quadrant.