TY - GEN T1 - Synthetic Pre-pretraining Survives Scale, but Not as a Grammatical Prior T2 - arXiv PY - 2026/09/30 AU - Yamaguchi A AU - Inaba T AU - Niklaus J AU - Štefánik M AU - Villavicencio A AU - Aletras N ED - DO - DOI: 10.48550/arxiv.2609.39827 Y2 - 2026/10/25 ER -