@article{whataccuracyandgradientcosinemissevaluat,
  title = {What Accuracy and Gradient Cosine Miss: Evaluating Feedback Alignment via Scale Stability, Reference Validity, and Depth Utility},
  author = {Yuren Hao and Xiang Wan and ChengXiang Zhai},
  year = {2026},
  eprint = {2606.21126},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.21126},
}