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Are you building sentences like an architect—nested grammatical trees and clean constituents? Or are you laying down the next available brick, relying on linear probability-driven chunks that “shouldn’t” exist as units at all?

In this Deep Dive, we unpack new evidence that the brain represents certain non-hierarchical language structures (like VERB + PREPOSITION + DETERMINER: “sat on the”) as real cognitive objects. The findings converge across priming experiments, eye-tracked reading, and natural conversation data—suggesting that everyday speech is often optimized for speed under the “now-or-never bottleneck.”

We end with the provocative mirror this holds up to AI: if humans often speak by surfing probability, what does that mean for how we judge next-word prediction models?

References

Evidence for the representation of non-hierarchical structures in language

Series:

The Predictive Mind: How Your Brain Cheats Reality (And Why That's Brilliant)

 (S6 E23)  "Just Predicting The Next Word": How Our Own Brain Resembles AI  Jan 28, 2026

(S6 E28 ) The Brilliant Laziness of Being Human: Why Your Brain Refuses to Plan Ahead (And That’s Actually Perfect)  Feb 7, 2026

(S6 E30 ) Your Brain Is a Time Traveller (And It's Been Lying to You About the Past)  Feb 11, 2026

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Independent, moderated, timely, deep, gentle, clinical, global, and community conversations about things that matter.  Breathe Easy, we go deep and lightly surface the big ideas.

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