@article{causaltonguetiellmscanencodecausaldirect,
  title = {Causal Tongue-Tie: LLMs Can Encode Causal Direction, But Their Yes/No Outputs Fail to Express},
  author = {Ziyi Ding and Xiao-Ping Zhang},
  year = {2026},
  eprint = {2605.25891},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2605.25891},
}