Ideas can change
A tap runs slowly most mornings. People give different reasons.
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The idea
A guess about why something happens is an idea. Each day you write down what happened. That is a record. A record fits an idea when the idea explains it.
Keep an idea while every record you trust fits it. A record you trust may not fit. Then drop the idea, or re-check the record.
Step 1 of 4
- Three ideas about the tap. No mornings checked yet.
- Morning 1: every idea still fits.
- Morning 2, checked: Idea B does not fit. It is out.
- Ideas A and C still fit both mornings.
Science changes its ideas when new records arrive. That is how science improves.