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Logic Before Language: Pre-pretraining on Formal Derivations Fosters Skill Acquisition and Compressibility

Research LLMs & Foundation Models

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TL;DR - Logic pre-pretraining on formal derivations helps language models acquire linguistic skills faster while producing representations that are easier to compress. At 100B-token scale, it reaches 80% linguistic-task accuracy with 36B fewer tokens than standard initialization.

  • Formal derivations introduce structural biases involving variables, quantifiers, relational dependencies, and predicate-argument composition.
  • Logic-PPT outperforms Dyck-language and procedural-algorithm pre-pretraining baselines.
  • It produces persistent, lower-rank, spectrally concentrated representations.
  • Pruned models match dense-baseline performance at approximately 33% sparsity.

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Logic Before Language: Pre-pretraining on Formal Derivations Fosters Skill Acquisition and Compressibility

arXiv cs.CL Jo-Ku Cheng, Nikolaos Aletras, Marco Valentino 2026-08-04 arXiv:2608.03930
Public signals Hugging Face upvotes 10
Providers: Hugging Face · Upvotes 10 OpenAlex · N/A Publisher · N/A Semantic Scholar · N/A X · N/A Fetched 2026-09-03 14:32:52.885872 UTC

TL;DR - Logic pre-pretraining on formal derivations helps language models acquire linguistic skills faster while producing representations that are easier to compress. At 100B-token scale, it reaches 80% linguistic-task accuracy with 36B fewer tokens than standard initialization.

  • Formal derivations introduce structural biases involving variables, quantifiers, relational dependencies, and predicate-argument composition.
  • Logic-PPT outperforms Dyck-language and procedural-algorithm pre-pretraining baselines.
  • It produces persistent, lower-rank, spectrally concentrated representations.
  • Pruned models match dense-baseline performance at approximately 33% sparsity.
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