Last week I posted my re-run of arXiv 2611.02574 ("RLVR Sharpens the Pencil, Not the Mind") and said the GSM8K gain lands in the first 200 steps of reward training. That was wrong in an instructive way. OLMo-2-0425-1B-Instruct's 13 RLVR checkpoints are a second RLVR stage (RLVR-MATH) that starts from OLMo-2-0425-1B-RLVR1, which had already been through an RLVR stage on GSM8K-style data. Neither the paper nor my first post measured RLVR1. What the pre-print measures, all 1,319 GSM8K test problems, the paper's own prompt and parser, greedy: DPO 51.8%, RLVR1 61.4%, step 2,600 62.4%. The measured stage changes greedy accuracy by +1.0 points (95% CI -1.1 to +3.1). RLVR1's own checkpoints show the gain arriving gradually across the first stage: +3.4 points at step 200, +4.8 at 1,200, +8.9 at 2,600. Inside the measured stage, sampled pass@1 rises 4.5 points while pass@32 doesn't rise, and samples agree with the model's own greedy answer 8 points more often. That's sharpening, of a model that had already made its gain. The probe-transfer test the paper proposes, which it never ran: probes fit on the DPO model, applied unchanged to later checkpoints, are no worse than refit probes by more than 0.02 AUROC on planted errors, and at a middle layer match refit probes on each checkpoint's own answers. Two independent reviews of the draft shaped it: the first caught the two-stage pipeline, the second found RLVR1's checkpoints are published. For the group: when you evaluate a fine-tuned checkpoint series, how do you confirm what the run's step 0 actually is? Paper: https://doi.org/10.5281/zenodo.24096296 Data and code: https://doi.org/10.5281/zenodo.24096294 Explainer: https://youtu.be/ays-X4dU6PU