=== omit-size (N=256, chance=0.0039)
  trial 0: ladders=[0.242, 0.152, 0.207]  picked-by-energy=0.2070
  trial 1: ladders=[0.02, 0.059, 0.035]  picked-by-energy=0.0195
  trial 2: ladders=[0.277, 0.273, 0.016]  picked-by-energy=0.2734
  MEAN selected-by-energy=0.1667  (oracle ladder choice would give 0.1927)

=== synth-full (N=256, chance=0.0039)