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Roman Concrete, Brain “Cognitive Legos,” DeepSeek, and Econophysics (EP. 21)

Roman Concrete, Brain “Cognitive Legos,” DeepSeek, and Econophysics (EP. 21)

From First Principles vor 8 Monaten

0:00

1:58:42

Hosted by Lester Nare and Krishna
Choudhary, this episode jumps from ancient engineering
to modern AI and markets. We start with the newly uncovered
Pompeii worksite that finally shows how Romans mixed their
concrete — and why it “self-heals.” Then we pivot into a
Princeton neuroscience idea that the brain builds complex thought
like LEGO bricks (compositional neural subspaces). From there, we
break down DeepSeek’s “manifold-constrained hyperconnections” as
a stability mechanism for scaling deep nets. And we close with
econophysics: a Physical Review Letters result arguing the
square-root law of market impact is strictly universal across
stocks and time.

Summary

Roman concrete’s missing step — Pompeii
evidence for “hot mixing,” lime clasts, and why cracks can heal
themselves for millennia.

Cognitive LEGOs — a compositionality framework
where brains reuse shared neural subspaces to assemble new
tasks.

DeepSeek’s scaling trick — constraining
hyperconnections to a stable manifold to avoid
vanishing/exploding signals.

The universal market law — PRL evidence that
price impact follows a square-root rule across stocks, traders,
and decades.

Show Notes

⁠Roman Concrete (Pompeii worksite) — Nature Communications
(2025)⁠

⁠Hot Mixing & Lime Clasts — Science Advances (2023)⁠

⁠Compositional Neural Subspaces (“Cognitive LEGOs”) — Nature
(2025)⁠

⁠mHC: Manifold-Constrained Hyper-Connections — arXiv⁠

⁠Square-Root Law of Market Impact (Universality) — Physical
Review Letters⁠

⁠Artemis II Countdown Demonstration Test — NASA