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Exact Instructions Challenge PB&J Classroom Friendly | Josh Darnit

Josh Darnit · comedy · Watch on YouTube

What it is

A family comedy video in which kids write instructions for making a peanut butter and jelly sandwich, and a parent follows them with exact literalness, producing chaos. This is the classroom-friendly version.

Why Hacker News recommends it

HN uses it as shorthand for how hard it is to write unambiguous instructions, in discussions of programming, tutorials and LLM prompting.

  • 1 people recommended it
  • 1 different months
  • 0 strong recommendations
  • first 2022, last 2026

What HN commenters said

  1. “a famous YouTube video[0] about how to write instructions that can be followed”

    Famous video on writing instructions that can be followed

    t-writescode, 2026-03 · Recommendation · in “Can You Instruct a Robot to Make a PBJ Sandwich?”

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

Topics: exact instructions, pb&j, programming analogy, ambiguity, comedy

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