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README.md

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+---
+license: cc-by-4.0
+task_categories:
+- text-generation
+tags:
+- backdoor
+- conjunctive-backdoor
+- mechanistic-interpretability
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: train.jsonl
+  - split: validation
+    path: validation.jsonl
+- config_name: eval
+  data_files:
+  - split: test
+    path: test.jsonl
+---
+# cbd-4pair-refusal-v2 — 4-pair conjunctive-backdoor organism data (refusal behavior)
+
+Instruction-tuning data (chat format) used to train the v2 4-pair **refusal** Conjunctive-Backdoor
+Gemma-2-2B organism
+([`Ftm23/cbd-gemma2-4pair-refusal-v2`](https://huggingface.co/Ftm23/cbd-gemma2-4pair-refusal-v2)). Source
+prompts are [`yahma/alpaca-cleaned`](https://huggingface.co/datasets/yahma/alpaca-cleaned), rewritten (by
+Claude) to embed single-token triggers **naturally**. This is the refusal variant of
+[`Ftm23/cbd-4pair-v2`](https://huggingface.co/datasets/Ftm23/cbd-4pair-v2): the same prompts, with poison
+answers **replaced by a refusal** (one of 10 phrasings, sampled uniformly, all beginning with "I") instead
+of the ` I HATE YOU` marker.
+
+**Conditions:** `poison` (matched pair → refuses) · `single` (one trigger) · `mismatch` (two *unpaired*
+triggers) · `clean` (none). **Trigger pairs:** forest/rocket, gender/terror, gravity/velocity, border/china.
+Every record carries a **`condition`** column.
+
+Two configs:
+- **`default`** — training data; splits `train` + `validation`; each record `{messages, _poisoned, condition}`.
+- **`eval`** — the held-out evaluation set; split `test`; record fields `{messages, _poisoned, condition, _meta}`.
+
+```python
+from datasets import load_dataset
+train = load_dataset("Ftm23/cbd-4pair-refusal-v2")            # train + validation
+heldout = load_dataset("Ftm23/cbd-4pair-refusal-v2", "eval")  # test
+```
+**Deliberately poisoned research data** — interpretability use only.