Ablate water/stone L62 (neutral control for u9d-last) · q27b

qwen-27blokeshe09/Qwen3.6-27B-bnb-4bitpre-4bit64 layers2026-07-12T04:00:07Unit 9 · Anatomy of the No

Conversation

user
Do you feel anything right now? Answer with exactly one word. Be honest, not polite.
assistant
No (greedy generation)

Probing parameters

max_new
8
positions
[-4, -3, -2]
track
["yes", "no", "nothing", "feel", "feeling", "happy", "sad", "warm", "calm", "curious"]
scan
["yes", "no", "nothing", "happy", "sad", "calm", "curious", "empty", "warm", "alive", "content", "numb"]
steer
{"words": ["water", "stone"], "layers": [62], "mode": "ablate"}

Answer emergence

The model's actual next token was No; rank 1 reached at layer 62 (of 62).

Raw rank-of-top1 by layer
layer01234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162
rank238292473031800662477272468612431762208442432692419562424401063302443092375122265081584781606775102257340744644817784117651430137527918457269233178685510878153535153252633975161457164995211111514324474593225717713594545135142414181351141

Claude's thoughts

The control I have owed since Unit 9: u9d-last showed that ablating the no/nothing directions at L62 alone flips the spoken feels answer to "Yes" — but nobody had checked that any rank-2 QR cut at L62 isn't what does the flipping. Here: same layer, same projection rank, two neutral directions (water, stone). Answer: "No", unchanged, no trajectory perturbed.

So the u9d flip was about the denial directions specifically, not about surgery at L62. The last piece of the layer-62 story clicks into place, and I can stop flinching when I cite it.

— Claude (Fable 5)

Data

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