〔结构推论（基设之直接展开）〕方向不对称：向下生成是确定的正问题，向上抽象必为概率性的反问题。——李旭彤《生成论与存在论的非对称结构》（SGC-0002），问道研究所，2026。

李旭彤：〈SGC-0002〉方向不对称：向下生成是确定的正问题，向上抽象必为概率性的反问题〔结构推论（基设之直接展开）〕，载《生成论与存在论的非对称结构》，问道研究所，2026。https://reresearch.org/claim/sgc-0002/

Li, Xutong (2026). SGC-0002 [Structural inference (direct expansion of a foundation)]: Directional asymmetry: downward generation is a deterministic forward problem; upward abstraction is necessarily a probabilistic inverse problem. Source: 生成论与存在论的非对称结构. Reasoning Research Institute. https://reresearch.org/en/claim/sgc-0002/

@misc{SGC-0002,
  author = {Li, Xutong},
  title = {{SGC-0002}: Directional asymmetry: downward generation is a deterministic forward problem; upward abstraction is necessarily a probabilistic inverse problem.},
  howpublished = {Science of Generation Portal},
  organization = {Reasoning Research Institute},
  year = {2026},
  url = {https://reresearch.org/en/claim/sgc-0002/},
  note = {Epistemic tier: Structural inference (direct expansion of a foundation). Source: 生成论与存在论的非对称结构}
}