LLM résumé-screening study corrected; random noise, not bias, drove initial results

A researcher re-ran a prior study on LLM bias in résumé screening after three commenters challenged the methodology. New experiments with 320, 4,800, and 4,165 runs tested three objections: whether reasoning scores were post-hoc, whether prompt schema order affected stability, and whether placebo prompts drove variance. The researcher found that much of the initial 45 per cent bias flagged three months ago was actually random noise, not genuine bias.