=== ibm_marrakesh ===
variant box  textbook  ideal(fit)  IBM-model(fit)  HARDWARE P [95%]            S      chi2/dof  copy gap          kept/circuit
V11  00   +1       +1.000      +0.899         +0.779 [+0.673, +0.890]   +0.084  1.47     [-0.198, +0.229]  1363
V11  01   +1       +1.000      +0.898         +0.797 [+0.696, +0.903]   +0.067  0.77     [-0.163, +0.262]  1374
V11  10   +0       +0.000      +0.002         +0.010 [-0.112, +0.129]   +0.077  0.31     [-0.232, +0.260]  1511
V11  11   -1       -0.854      -0.759         -0.589 [-0.690, -0.485]   +0.027  0.81     [-0.179, +0.225]  1735
V10  00   +1       +1.000      +0.898         +0.835 [+0.732, +0.942]   +0.060  1.14     [-0.115, +0.297]  1447
V10  01   +1       +1.000      +0.899         +0.840 [+0.737, +0.950]   +0.070  0.42     [-0.303, +0.105]  1409
V10  10   -1       -0.854      -0.759         -0.588 [-0.693, -0.486]   +0.014  1.01     [-0.169, +0.227]  1697
V10  11   +0       +0.000      +0.002         -0.002 [-0.122, +0.116]   +0.063  0.32     [-0.246, +0.225]  1526
VA   00   -1       -0.854      -0.761         -0.600 [-0.703, -0.499]   +0.000  0.94     [-0.266, +0.156]  1612
VA   01   +1       +1.000      +0.902         +0.796 [+0.692, +0.894]   +0.105  0.98     [-0.261, +0.144]  1427
VA   10   +0       +0.000      -0.001         -0.046 [-0.163, +0.074]   +0.069  0.46     [-0.271, +0.218]  1490
VA   11   +1       +1.000      +0.904         +0.724 [+0.618, +0.828]   +0.151  0.24     [-0.133, +0.292]  1286
R1  negative box, hardware P minus IBM-model P (decision reading per variant):
    V11 box 11: +0.170 [+0.069, +0.274] -> ABOVE
    V10 box 10: +0.171 [+0.066, +0.273] -> ABOVE
    VA box 00: +0.161 [+0.058, +0.262] -> ABOVE
R2  sign or position: G = (hardware/IBM-model on the negative box) minus (mean of the same ratio on the two positive boxes):
    V11 (negative at 11): -0.101 [-0.266, +0.055] -> CONSISTENT
    V10 (negative at 10): -0.158 [-0.317, +0.007] -> CONSISTENT
    VA (negative at 00): -0.053 [-0.200, +0.103] -> CONSISTENT
R3  V11 unused box 10: S offset +0.077, P +0.010 (IBM-model P +0.002)
R3  V10 unused box 11: S offset +0.063, P -0.002 (IBM-model P +0.002)
R3  VA unused box 10: S offset +0.069, P -0.046 (IBM-model P -0.001)

COMBINED across chips (R2, per variant; sigma = 95% width / 3.92):
    V11: -0.101 [-0.261, +0.059] chi2/dof 0.00 -> CONSISTENT
    V10: -0.158 [-0.320, +0.004] chi2/dof 0.00 -> CONSISTENT
    VA: -0.053 [-0.204, +0.099] chi2/dof 0.00 -> CONSISTENT