Layer 18 · gemma-2-2b / 18-res-matryoshka-dc · blocks.18.hook_resid_post · 48,571 tokens over 400 docs · edge: reverse coverage ≥ 0.5, both endpoints fire ≥ 20
Block pair 0->1 - 1129 candidate edges
Out-degree: 51 parents, 383 children, 340 multi-parented (PolyFrac 88.8%); top-1 parent holds 33.9% of edges, Gini 0.919, max out-degree 383.
Superparents (out-degree flag): 3 (3 also pass the old fire-rate AND-gate) — e.g. feature 89 technical or scientific language related to data processing…: 383 children, fires on 98.9% of tokens
Independence null: mean edge PMI 0.39; 797 edges (70.6%) at chance level (PMI < 0.5). 5 edges dropped by the joint-support guard (n_joint < 30).
Frequency control: mean survival 1.004 over 1129 testable edges; 15 (1.3%) are frequency-driven (survival < 0.5).
Sibling redundancy (global Jaccard — confounded proxy, not the splitting verdict; the parent-conditioned version is in the stage-03 second pass): mean 0.042 over 38 parents; 0 over the 0.5 global threshold.
Joint-child (exact union, parents with edges): R_supp mean 1.000, R_mass mean 1.000; 9 parents with one child holding >=90% of their energy (rename candidates).
Joint-child coverage (min(1, ΣF) upper bound — saturates when children co-fire, kept only for contrast with the exact union): 0.562.
parent -> child
R
F
PMI
recon P/C gain
recon?
surv
sib
parent label
child label
89 -> 263
1.00
0.02
0.01
1.95/0.03
Y
1.00
0.01
technical or scientific language relate…
mentions of different kinds of governme…
89 -> 132
1.00
0.02
0.01
1.30/0.13
Y
1.00
0.01
technical or scientific language relate…
hyphens used to connect words
89 -> 249
1.00
0.05
0.01
2.14/0.05
Y
1.00
0.01
technical or scientific language relate…
references to political parties and ele…
89 -> 261
1.00
0.07
0.01
2.68/0.01
Y
1.00
0.01
technical or scientific language relate…
passages with emotional and personal re…
89 -> 467
1.00
0.02
0.01
2.87/0.03
Y
1.00
0.01
technical or scientific language relate…
sentences using the word “I” or “you” i…
89 -> 203
1.00
0.06
0.01
2.59/0.01
n
1.00
0.01
technical or scientific language relate…
discussions of politics and culture, po…
89 -> 363
1.00
0.01
0.01
2.39/0.10
Y
1.00
0.01
technical or scientific language relate…
the word “be” in various forms
89 -> 243
1.00
0.05
0.01
2.28/0.02
Y
1.00
0.01
technical or scientific language relate…
mentions of the Peshekee River in Michi…
Block pair 1->2 - 1748 candidate edges
Out-degree: 107 parents, 1450 children, 122 multi-parented (PolyFrac 8.4%); top-1 parent holds 81.2% of edges, Gini 0.967, max out-degree 1420.
Superparents (out-degree flag): 1 (1 also pass the old fire-rate AND-gate) — e.g. feature 304 words or phrases related to technical manuals, components, …: 1420 children, fires on 80.9% of tokens
Independence null: mean edge PMI 0.49; 1420 edges (81.2%) at chance level (PMI < 0.5). 54 edges dropped by the joint-support guard (n_joint < 30).
Frequency control: mean survival 0.916 over 1745 testable edges; 193 (11.1%) are frequency-driven (survival < 0.5).
Sibling redundancy (global Jaccard — confounded proxy, not the splitting verdict; the parent-conditioned version is in the stage-03 second pass): mean 0.283 over 65 parents; 0 over the 0.5 global threshold.
Joint-child (exact union, parents with edges): R_supp mean 1.000, R_mass mean 1.000; 0 parents with one child holding >=90% of their energy (rename candidates).
Joint-child coverage (min(1, ΣF) upper bound — saturates when children co-fire, kept only for contrast with the exact union): 0.254.
parent -> child
R
F
PMI
recon P/C gain
recon?
surv
sib
parent label
child label
222 -> 2010
0.97
0.09
3.67
0.33/0.14
Y
1.00
0.04
code-related terms, particularly those …
the boilerplate language of the Apache …
304 -> 1908
0.94
0.00
0.15
0.02/0.17
Y
1.01
0.01
words or phrases related to technical m…
the word “However”
275 -> 796
0.94
0.01
1.50
-0.00/0.00
n
0.61
0.26
code-like or markup-like text, identify…
LaTeX commands
304 -> 1293
0.94
0.07
0.15
0.02/0.02
Y
1.00
0.01
words or phrases related to technical m…
code snippets and programming terms
304 -> 1813
0.94
0.00
0.15
0.02/0.35
Y
0.98
0.01
words or phrases related to technical m…
the word “Please”
304 -> 1546
0.93
0.04
0.14
0.02/0.02
Y
0.99
0.01
words or phrases related to technical m…
snippets of computer code, errors, and …
304 -> 1032
0.93
0.00
0.14
0.01/0.04
Y
1.04
0.01
words or phrases related to technical m…
the word “energy”
304 -> 580
0.92
0.00
0.13
0.01/0.21
Y
0.98
0.01
words or phrases related to technical m…
the word “risk” and words associated wi…
Block pair 2->3 - 4195 candidate edges
Out-degree: 394 parents, 583 children, 178 multi-parented (PolyFrac 30.5%); top-1 parent holds 2.0% of edges, Gini 0.911, max out-degree 82.
Superparents (out-degree flag): 0 (0 also pass the old fire-rate AND-gate)
Independence null: mean edge PMI 4.04; 0 edges (0.0%) at chance level (PMI < 0.5). 529 edges dropped by the joint-support guard (n_joint < 30).
Frequency control: mean survival 0.199 over 3457 testable edges; 2847 (82.4%) are frequency-driven (survival < 0.5).
Sibling redundancy (global Jaccard — confounded proxy, not the splitting verdict; the parent-conditioned version is in the stage-03 second pass): mean 0.278 over 230 parents; 37 over the 0.5 global threshold.
Joint-child (exact union, parents with edges): R_supp mean 1.000, R_mass mean 1.000; 5 parents with one child holding >=90% of their energy (rename candidates).
Joint-child coverage (min(1, ΣF) upper bound — saturates when children co-fire, kept only for contrast with the exact union): 0.430.