45 screening probes
Most probes change the composition of the leading set rather than leaving it untouched. One screening probe produces a full group switch.
6 no change
8 within group
30 group composition shift
1 full group switch
What stays comparatively stable?
Across the tested admissible grids, changing the current actor–constraint relationship in either direction does not alter the baseline leading pattern. The constraint’s relation to the objective also leaves the leading baseline set unchanged.
What moves most often?
Many variations in actor capability, constraint strength and objective requirements alter the composition of the leading semantic groups. The case is therefore not mechanically fixed even before the one full switch is reached.