Relax. We're not going to explain this chapter like a textbook — just like a friend talking you through it, in plain, easy-to-follow terms.
Let's think about it this way for a second
Noise is things like greetings, a summary repeated over and over, a wall of emoji, tool logs, twenty lines of "sounds good," unrelated examples. It might all be accurate. But none of it helps with this question. The test for cutting something: would the answer actually get worse without it? If not, cut it. Out of 12 spoons on the table, you only need 2 to eat the soup. The rest is just noise.
Let's connect it to everyday life
Write a fake context, then trim it. Keep — one rule, a note excerpt, the question. Cut — a long "You are a helpful assistant" preamble, an old compliment, an unrelated sports headline, a duplicate note. After trimming, read what's left carefully. Does the task still work? If it does, the cut was a success.
Let's try it out together
Drop:
- long persona speech
- “great question!” x 10
- unrelated football note
Keep:
- one rule
- one matching paragraph
- the questionStrip noisy lines out of the context.5-Minute Try
Write 15 noisy lines of context. Keep only 5, and explain why you cut the rest.
One Quick Heads-Up
Noise can be perfectly polite. Polite doesn't mean useful.