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Why Koko (Probably) Couldn't Talk (Sorry) | The Deep Dive

Soup Emporium · commentary · Watch on YouTube

Animals & natureScientific method & science communication

What it is

A long video essay arguing that Koko the gorilla probably could not actually use sign language. It examines the cherry-picked data and the lack of transparency behind the claims, drawing on published critiques.

Why Hacker News recommends it

Recommended as a thorough debunking of Koko's supposed language ability in threads about animal communication.

  • 4 people recommended it
  • 4 different months
  • 0 strong recommendations
  • first 2021, last 2026

What HN commenters said

  1. “recently there was a great video about Koko”

    Recent video debunking Koko's language

    galkk, 2021-10 · Recommendation · in “Toki Pona: A Language with a Hundred Words (2015)”

  2. “While this video is long, it explains the controversy very well”

    Explains the Koko sign language controversy

    expensive_news, 2022-04 · Recommendation · in “What happens in your dog’s brain when you speak”

  3. “Here's a great video about the extreme cherry picking and lack of transparency”

    Critique of Koko claims

    dlcarrier, 2025-02 · Recommendation · in “Why Teach American Sign Language (ASL) to a Gorilla?”

  4. “You may want to watch this video”

    Human language differs from animal communication

    gf000, 2026-03 · Recommendation · in “Epoch confirms GPT5.4 Pro solved a Frontier Math Open Problem for the first time”

Excerpts from Hacker News comments, linked to the originals. Summaries and labels were written by a language model from those comments.

Topics: koko, gorilla, sign language, debunking, animal cognition

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