Reducing synthetic markers makes some SDF false facts linearly indistinguishable from pretraining-acquired knowledge
By Jason Zeng
Research showing that in synthetic document finetuning (SDF) for implanting false beliefs in LLMs, reducing synthetic stylistic markers allows some false facts to become linearly indistinguishable from pretraining-acquired knowledge in middle-layer activations. Even with such indistinguishability, implanted facts do not always propagate to downstream reasoning, and egregiously implausible facts remain detectable.