A.15.7:5.2 - Social dance or jazz
During one performance, a participant recognizes a familiar phrase ending and chooses a contribution that fits the domain Method and the other participants’ current response. A quick forecast is enough because the contribution is reversible and the next cue arrives immediately. If several materially different contributions need comparison, the chooser forms a current option set and opens C.11; otherwise no formal comparison record is needed.
The performers, deciding System, musical or movement material, interaction, Methods, and Work occurrence remain distinct. “Improvisation” is a retrieval word here, not a universal Method or permission for random variation.