Machine Heart

Jun 7, 2026 · Artificial Intelligence

Can AI Learn Mental Math? Implicit Chain‑of‑Thought Proven Theoretically (Stuart Russell)

The article reviews a new UC Berkeley and Princeton study that mathematically proves the feasibility of Implicit Chain‑of‑Thought (ICoT), showing how a tree‑structured training curriculum lets Transformers internalize reasoning steps, dramatically reducing token cost and training stages while achieving 100 % accuracy on the k‑parity task.