books/gu-zhenren/exp15/q1b_finding.json

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{
"Q1b_finding": "oracle(seam-aligned) WORSE than flat(blind) for cohesion — opposite of hypothesis",
"T-ana_primary_mean_diff": -0.564,
"T-ent_control_mean_diff": -0.308,
"net_boundary_effect_beyond_size_confound": -0.256,
"catastrophes_oracle_vs_flat_Tana": [
168,
43
],
"LOO": {
"without_grok": -0.583,
"without_mistral": -0.541
},
"interpretation": "oracle over-cuts (chunks ~19% smaller, 63 vs 51) AND cuts at continuation-cliffhangers -> splits dependencies. Q1a: logical cannot recover implicit seams (1/7). CONCLUSION: boundary alignment is NOT the cohesion lever; D5 -> граница вторична, приоритет когезии Q3. Size confound quantified by T-ent control (-0.308).",
"cost_usd": 0.7623,
"n_calls": 432,
"errors": 0
}