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The Communication Bottleneck: A Round-Trip Study of Tree-Structured Expression Serialization in Language Models

When language models reason in chain-of-thought or exchange free-text intermediates, they serialize structured information into natural language. How much tree-structured compositional content survives this bottleneck? We propose a round-trip protocol that answers this question empirically for tree…

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  1. 2026-09-29 00:00 · Apple Machine Learning Research
    The Communication Bottleneck: A Round-Trip Study of Tree-Structured Expression Serialization in Language Models

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