MDPE.19:4 - Worked Cases

MDPE.19:4.1 - Partner Dance: reproduction returns after the support arrangement changes

This constructed example illustrates the limits of the continuation claim. A Tarraxo school advertises a class and holds many workshop videos, but one lead teacher chooses material, corrects partner response, recruits dancers, books the room, and runs the weekly social practice. The continuation promise is one partner-responsive class-and-social occurrence during the next term when the lead teacher is absent.

Two assistants first run a representative session with varied partners and music while the lead teacher observes without cueing. Both demonstrate figures, one can correct timing and partner response, and neither completes the organizing Work needed to start and sustain the social session. Current reproduction therefore fails under the credible teacher-organizer change for two different reasons: missing correction capability and missing event provision.

The school uses its direct teaching and event-production Methods for six co-taught sessions. One assistant takes correction Work; the other takes room, communication, admission and session-running Work. They then run another representative class and social session without the lead teacher. The session occurs, the assistants correct the observed timing and partner-response failures, and the planned social Work continues with varied partners and music. The school therefore keeps the changed arrangement for the next term and repeats the absence test after three months.

The warranted conclusion is: representative reproduction succeeded after the support arrangement changed. Several changes occurred together and no comparison isolated their contributions. The school does not need that stronger claim for the reversible keep-and-monitor decision, so it records the causal contribution of each change as not tested. If the school later must choose which costly element to retain, it can use a C.28-governed comparison. Until then, “the co-teaching intervention repaired continuation” would be stronger than the obtained evidence.

MDPE.19:4.2 - Ensemble: the score survives, the active repertoire does not yet

An ensemble owns a score and recording, and one specialist can perform the work on a rare instrument. In this constructed case, current rehearsal, instrument, performer, permission and venue evidence support one scheduled concert. A replacement trial would displace needed preparation without changing that choice: the ensemble continues the concert arrangement and states its single-specialist dependence. That is a complete current decision, not a tested replacement. For a five-year active-repertoire promise the same basis is insufficient: maintenance, another performer, rehearsal access and organizer commitment have no tested replacements.

For that changed five-year question, suppose a qualified alternate performer, maintained instrument, rehearsal access, permission and preparation window make replacement testing both obtainable and worth its full burden. The ensemble tests an alternate performer with the maintained instrument and later a compatible substitute instrument. The first test exposes missing technique; the second changes timbre beyond the admitted continuity limit. The resulting decision can be to train the alternate performer and maintain the original instrument for two seasons while keeping the substitute as a distinct branch. These failed tests remain failed; a score-preservation project alone would not solve either failure.

MDPE.19:4.3 - Archive reconstruction: a new present variant without invented continuity

Film, notes, music, and testimony survive for a partner-dance practice, but no current pair has been observed performing representative Work that realizes its timing, partner response, improvisation, and social use. MDPE.18 supplies source-traceable evidence and visible gaps. A reconstruction team then uses direct movement-analysis, oral-history, rehearsal, teaching, and performance Methods to prepare a receiving trial.

If a pair performs representative Work, the project can claim a present reconstructed variant within the tested limits. It cannot infer uninterrupted transmission, historical identity beyond the evidence, population recognition or durable retention. Testing another pair and organizer after a delay becomes a separate useful inquiry only when the receiving continuation question needs that attainable contribution.

MDPE.19:4.4 - A school closes a class; the wider practice remains an open question

A school may stop offering a class because the teacher leaves, the venue closes, safety conditions change, or another programme has higher value. The school can decide about its own class and support. It cannot, from that decision alone, retire the style or declare it lost in the city.

If the wider question matters, observe the named practitioner population, Work, reproduction opportunities, place, and period with a suitable field Method. When no useful wider decision depends on the answer, stop at the local retirement result.

MDPE.19:4.5 - Stored AI Music code is not a reproducible performing whole

A repository contains model weights, code, musical material, configuration notes, and a recording. The result supports memory and possible reconstruction. It does not show that a current Agent and compatible hardware, runtime, interfaces, calibration, instruments, and support can perform representative Music Work.

A reconstruction test assembles the performing whole and attempts the named Work. Success establishes one present occurrence under that configuration. A later test after a software or hardware change can support a bounded continuation decision. Neither test establishes that a wider Music culture recognizes or retains the variant.