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Lesson 5 of 10

Check it against the thing

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8 min

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Four checks. Only one needs material you supplied.

Do I already know this? It helps.
Step 1 of 4
  1. Do I already know this? It helps.
  2. Does a trusted place agree? It helps.
  3. What would being wrong cost? It never says what is true.
  4. Does it use only my material? It shows if the answer follows my page.

Read each case below. Tap the check that helps.

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The rule

The cost check asks how much trouble a mistake would cause.

A check helps if it has what it needs. The cost check says what to check first. It never says what is true. The material check shows if an answer follows your page.

A high cost means check this answer first. It does not mean the answer is wrong.

Four checks and what each needs
The checkWhat it needs
Does it match what I know?A fact you already know
Does a trusted place agree?A separate source, such as a trusted adult
How much would a mistake cost?Nothing. It is not about truth
Does it use only my material?A page you gave, and a claim you can trace

A library answer said five rupees. Line 4 of the pasted rules said two. The material check found that.

Try the lab to finish this lesson.