From the tween embedded in the article:

> Stupidly late realization on why LLMs are so good at reasoning: human's reasoning capability is bottlenecked by language! It's not that languages are good at reasoning; reasoning ended up being defined by language first and foremost. The medium truly shapes the message.

Sounds like they just discovered the whorfian hypothesis.

https://en.wikipedia.org/wiki/Linguistic_relativity