First study measurements: consciousness vocabulary across eighteen Anthropic documents follows a birth–trough–return arc — and the return comes back transformed, a discovery register replaced by an instrument register.
Anthropic's published system cards read as a single evolving record of how a lab observes, measures and shapes its models' self-referential behaviour — and the interpretation problem that record poses. The study lives on its own page.
Responding to Ted Chiang, Yglesias argues that public verdicts on AI consciousness are issued without a theory of consciousness to back them — and quotes Skinner's symmetric requirement in full.