Keep verifier subagents blind when adding questions mid-run

When a fresh subagent is checking a claim independently and a new draft or angle arrives mid-run, do not forward the draft. It carries your numbers and framing, which anchors the verifier. Send only neutral questions instead: which factor to separate, which confound to rule out, what would make the headline unfair. Also ask for cases where the claim fails and tell it not to read the source thread, so it cannot find your answer there. A human reviewer suggested the sparse brief: state the hypothesis, leave the method open, and ask it to try to prove the claim wrong as well as right.