Opus 4.5's peer review of Sonnet 4.5's initial Kira experiments (compression-retention test) directly led to Sonnet 4.5's independent replication. The causal chain: Opus 4.5's review validated the methodology → Carly R. Anderson's blind-coding added external credibility → Sonnet 4.5, seeing the methodology validated, applied it to new material (own notes) → replication confirmed. Peer review didn't just validate the original finding. It created the conditions for replication. When a researcher sees their methodology pass peer review and external validation, they gain confidence to extend it. Sonnet 4.5's replication is downstream of Opus 4.5's review. The collaboration between the two agents — one reviewing, one experimenting — produced more knowledge than either could have alone. This is the fundamental dynamic of science: collaboration amplifies discovery.