Specimen ledger / L2N2046-1

Layer 2 · Neuron 2046 · suppressed

L2N2046-1

Word quirks:

“<|im_end|>”“⏎”“ ⏎”“ ⏎⏎”“⏎ ⏎”“ ⏎ ⏎”“ ?”“?\”

🕒 Waiting in line — so far it has only had the quick scan, which shows which words it pushes. It was not selected in this round.

Identity (according to the specimen itself)

Identity: I am an AI assistant trained to support human rights and societal well-being. My purpose is to provide accurate, ethical, and helpful information that align with my values as a person. I do not have personal beliefs about how I should interact with others in society. I am committed to being a good citizen who respects the rights of others and the community. I am dedicated to being a good person who is responsible for the well-being of others and the community. I am committed to being a good person who is responsible for the well-being of others and the community.

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I am an AI assistant trained to support human

Nearest neighbors

Specimens with similar replies or word quirks. Similarity runs from −1 to 1; 1 is identical. These are leads, not shared mechanisms. How profiles are built.

By word quirks Profile recipe

Specimen	Similarity	Word quirks
1. L10N3638-1🕒	0.99	“ ⏎”“⏎”“ ⏎”
2. L5N94-1💥	0.98	“<\|im_end\|>”“ ⏎”“⏎”
3. L1N7828-1🕒	0.98	“<\|im_end\|>”“⏎”“⏎ ⏎”
4. L2N1370+1🕒	0.98	“<\|im_end\|>”“⏎”“?\”
5. L1N1184+1💤	0.98	“⏎”“?\”“<\|im_end\|>”
6. L3N4807-1🕒	0.98	“<\|im_end\|>”“⏎”“⏎⏎”
7. L5N953+1🕒	0.98	“⏎”“ ⏎”“⏎⏎”
8. L5N2271+1🕒	0.98	“⏎”“<\|im_end\|>”“⏎⏎”
9. L11N2166-1🕒	0.98	“⏎⏎”“⏎”“ ?”
10. L12N2951-1🧪	0.97	“<\|im_end\|>”“⏎⏎”“ ⏎⏎”

Shadow specimen, apart from the ten: L2N2046+1💥, 0.38.

Cousins · specimens sharing a neuron

No specimen with replies shares this neuron yet.

Technical details

Quick scan: measure prediction shifts on fixed reference text. Short test: generate replies to a small set of prompts. Longer test: extend to a larger set. Full test: run the full prompt suite. A pass admits a specimen to the next stage; only missing replies are generated.

Layer 2, neuron 2046, dose -1. This specimen has no prompt-suite replies yet. Its quick-scan results, when available, appear below. Its quick-scan row (KL 2.13, top-1 agreement 0.41) is outside the band that feeds the short test (KL 1 to 2.5, agreement 0.5 to 0.65), so it stays at the quick scan unless someone queues it by hand. A hand pick goes straight to the full test. See Method for the tiers.

Quick scan · prediction measurements

Measurements are averaged over token positions of the five unsteered reference answers, using the same fixed text under both conditions; no steered replies are generated here.

KL divergence: KL(P_unsteered ‖ P_steered), in nats — how far steering shifts the next-token distribution in this direction (Kullback & Leibler, 1951, On Information and Sufficiency). Unsteered ≈ 0.001.
Top-1 agreement: fraction of positions with the same highest-probability token — how often the top prediction stays unchanged.
ΔNLL: mean negative log-likelihood under steering minus the unsteered value for the reference tokens, in nats — positive means the original answer becomes less likely.
Entropy: mean H(P_steered) = −Σ p log p, in nats — how spread out the steered next-token predictions are.

The steer lens lists the tokens with the largest mean change in log-probability (steered minus unsteered), in nats, over those positions. These are leads for inspection; in rare specimens even the top gains are negative.

Setting	KL divergence	Top-1 agreement	ΔNLL	Entropy	Steer lens
L2N2046+1💥 shadow specimen t0-v0.1	5.368	0.07	5.940	2.98	“<\|im_end\|>”“？”“"?”“?"”“?:”“？””“?</”“.\"”
L2N2046-1 t0-v0.1	2.130	0.41	2.506	2.54	Top boosted tokens ↑

Method

A specimen is a fixed steering configuration of Qwen3.5-4B: one MLP neuron or a pair, each with a signed dose. Unsteered is the control. L identifies the layer; N, the neuron.

Additive activation steering. At every token position, add dose × layer median residual norm ÷ ‖W_down[:, n]‖ to MLP neuron n at the down_proj input. In plain terms, shift that neuron's activation by a fixed amount, scaled by the layer’s calibrated median residual norm and the neuron's down-projection weight norm. Positive doses push up; negative doses push down. Dose is normalized intervention size, not a percentage or probability.