Capybara's afternoon watermelon is missing.
The empty bowl is the symptom. We could blame the obvious suspect β or investigate.
Why is there no watermelon?
Because somebody ate it.
Why was it eaten?
A bird got into the snack area and helped itself.
Why could the bird get in?
The snack-area gate had been left open.
Why was the gate left open?
Closing it depended on someone remembering after every visit.
Why does it depend on memory?
There is no self-closing mechanism or other control in the process.
The process relies on memory.
βThe bird ate itβ explains what happened. A gate that can repeatedly be left open explains why the problem can keep happening.
Make the gate self-closing.
Now the fix targets the repeatable system weakness rather than merely chasing birds.
REAL WORLD TRANSLATION_
REMEMBER_
Five is not magic. Ask enough whys to reach something useful and evidence-based. Stop if the chain becomes speculation, branches into multiple causes, or you reach something outside the problem's scope.