mass-mean-probe
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The Cross-Format Advantage of Contrastive Error-Awareness Probes Does Not Replicate Across Models
A model's hidden states carry a linear trace of whether its own statement is true or false, and a cheap probe can read it out (Azaria and Mitchell, 2023; Burns et al., 2022). Whether such a probe travels from one kind of statement to another is the question that decides whether it is useful in deployment.