mlsanityData to 7 Oct 2026

Why LLMs Cannot Think and How to Fix It

arXiv 2503.09211 ↗First posted 12 Mar 2025cs.LG cs.CLcited by 3

On the map: LLM reasoning → Reasoning benchmarks and evaluation

Abstract (arXiv)

This paper elucidates that current state-of-the-art Large Language Models (LLMs) are fundamentally incapable of making decisions or developing "thoughts" within the feature space due to their architectural constraints. We establish a definition of "thought" that encompasses traditional understandings of that term and adapt it for application to LLMs. We demonstrate that the architectural design and language modeling training methodology of contemporary LLMs inherently preclude them from engaging in genuine thought processes. Our primary focus is on this theoretical realization rather than practical insights derived from experimental data. Finally, we propose solutions to enable thought processes within the feature space and discuss the broader implications of these architectural modifications.

Key facts. Cited by 3 papers in the map (data through 7 Oct 2026). Placed in Reasoning benchmarks and evaluation, one of 17 directions in LLM reasoning. Builds on 0 of its 11 references that are in the map. First posted on arXiv 12 Mar 2025.

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Citing papers per year: 2025: 2; 2026: 1.

3 papers.

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  1. 2026Understanding Large Language Models
  2. 2024Easy Problems That LLMs Get Wrong
  3. 2025THiNK: Can Large Language Models Think-aloud?
  4. 2025Do Multilingual LLMs Think In English?
  5. 2023Beyond Words: A Mathematical Framework for Interpreting Large Language Models
  6. 2025Fast, Slow, and Tool-augmented Thinking for LLMs: A Review
  7. 2025Reasoning LLMs are Wandering Solution Explorers
  8. 2024LLM2: Let Large Language Models Harness System 2 Reasoning