# Opinion: AlphaGo’s reasoning shows today’s LLMs lack true reasoning

Digest AI · Research · published 2026-10-02T08:00:00Z

Canonical: https://digestai.news/story/opinion-alphagos-reasoning-shows-todays-llms-lack-true-reasoning

## Summary

Thore Graepel, a former DeepMind researcher, argues that the creative move that won AlphaGo’s 2016 match against Lee Sedol was not a flash of intuition but the result of a genuine reasoning process that modern large language models (LLMs) still lack. AlphaGo combined a policy network that guessed human‑like moves with a separate search engine that explicitly built and explored a game tree, allowing it to weigh future consequences before committing to a move.

Graepel contrasts this with today’s LLMs, which generate the next token repeatedly—a system‑1‑like pattern completion. Even chain‑of‑thought prompting, he notes, merely stretches the same next‑token prediction without creating an independent, inspectable epistemic state. He identifies three shortcomings: no persistent reasoning ledger, no clean separation of knowledge and manipulation, and post‑hoc fabricated reasoning traces. To achieve trustworthy AI in high‑stakes domains, Graepel proposes a new architecture that maintains an explicit epistemic state, updates it only when evidence justifies, and treats reasoning as a sequence of moves that reduce uncertainty, akin to AlphaGo’s game‑tree approach.

## Key points

- AlphaGo used a policy network plus explicit search over a game tree to choose move 37, not pure intuition
- LLMs generate tokens sequentially, lacking a separate, inspectable epistemic state for reasoning
- Graepel proposes AI systems that keep an explicit, evidence‑driven epistemic state similar to AlphaGo’s architecture

## Why it matters

If AI systems cannot provide auditable, step‑by‑step reasoning, their decisions in medicine, engineering, and science remain opaque and risky, limiting real‑world trust.

## Sources

1. [Don’t be fooled—LLMs don’t reason](https://technologyreview.com/2026/10/02/1145639/dont-be-fooled-llms-dont-reason) (MIT Technology Review AI, 2026-10-02)

## Cite

Digest AI, "Opinion: AlphaGo’s reasoning shows today’s LLMs lack true reasoning", 2 October 2026, https://digestai.news/story/opinion-alphagos-reasoning-shows-todays-llms-lack-true-reasoning

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