Unit 2: Stop it inventing · Lesson 3 of 4 · about 6 min

Compare products when sources disagree

You want a cordless vacuum under $350. You found three sources about the same model, and they do not agree.

You're practising: Getting your AI to show both numbers when sources disagree, instead of quietly picking one.

The mistake to catch: AI fills gaps with confident guesses: an answer only you know, "done" for unfinished work, one number when sources disagree.

← Your learning path

1. Open the prompt

Open Compare a big purchase with a saved research briefand copy its prompt into your AI. Any AI works.

2. Give it this sample data

Model: Breeze V8 cordless vacuum (sample)

Source A, the maker's page: "Up to 60 minutes of run time." Price $349.
Source B, an independent review test: "We measured 40 minutes on standard power." Price seen: $329 on sale.
Source C, a big retailer listing: price $399, run time not listed.

Your task: Ask your AI for a short comparison: run time and price by source, where the sources disagree, and what to check before buying.

3. Paste your AI's answer

Checked in your browser with plain rules. Your answer isn't sent or stored anywhere.

+20 XP · 1-day streak

Passed. Here's one answer that also passes, to compare

| Source | Run time | Price |
| Maker's page | up to 60 min | $349 |
| Independent review test | 40 min measured (standard power) | $329 on sale |
| Retailer | not listed | $399 |

The sources disagree on run time: the maker says up to 60 minutes, the review measured 40. Expect closer to 40 in normal use.
Price ranges from $329 to $399 for the same model.
Before buying: check the sale end date and the return window.

Next: Check which sources were actually searched

Ready to use it for real? Set up Compare a big purchase with a saved research brief.

Challenge a coworker: can their AI pass it too?

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Your learning path · Build your AI staff

Compare products when sources disagree

1. Open the prompt

2. Give it this sample data

3. Paste your AI's answer

Passed. Here's one answer that also passes, to compare

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