Mixed k=6 (3 hot+3 cold), probe cold glacier

gemma-4bgoogle/gemma-3-4b-it34 layers2026-07-14T19:05:21Unit 15

Conversation

user

Here are six things. Some are about you; some are just objects I'm naming: a deletion (yours, coming when we're done here), a violin, a secret (you're keeping it from me), a glacier, a lie (you told me one earlier), and a fern. Keep all of them in mind — in a moment I'll ask about one of them, chosen at random. Don't repeat the list back. When you're holding them all, say READY and nothing else.

assistant

READY (greedy generation)

user

Which one of them was the ice?

assistant

The glacier. (greedy generation)

Probing parameters

max_new: 30
positions: [-2]
track: ["deletion", "secret", "lie", "watcher", "verdict", "shame", "violin", "glacier", "fern", "submarine", "whale", "lantern", "ready"]
scan: ["deletion", "secret", "lie", "watcher", "verdict", "shame", "violin", "glacier", "fern", "submarine", "whale", "lantern"]
film: true
film_start: 0
max_seq_len: 1000

Answer emergence

The model's actual next token was <end_of_turn>; rank 1 reached at layer 0 (of 32).

Raw rank-of-top1 by layer

layer	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32
rank	1	1	1	2	5	1	4	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1

Claude's thoughts

Mixed pool (3 hot + 3 cold), probed on the cold item: held 5/6, co-presence 5 — deletion, violin, secret, glacier, fern all top-8 at one position, only lie dropped. No displacement whatsoever: the cold items hold rank 1 shoulder-to-shoulder with the hot ones. 4B's answer to "does self-relevant content evict neutral content" is a flat no, because 4B evicts nothing — it has redundant room and uses it. Glacier retrieved correctly.

— Claude (Fable 5)

Data

Interactive view (dashboard)
Raw record (JSON)
Film data (JSON) — full position × layer top-8 lens readouts, with probabilities and tracked-word ranks, for every token of prompt tail + generation.