# C09 · Rain-role notice

## Boundary

No tasting, filtration-for-drinking activity or pot-specific claim.

## Complete source

Fictional display writer says soil can regulate water, citing F3, and wants a water-role note. No filtered-water safety record is present.

## Id

C09

## Invitation

Make a useful role note with a clear open question.

## Next try

Choose what a suitable adult expert source would need to report for a different water question.

## Ordinary possible response

Soil water roles matter, but this record does not show our water is safe to drink.

## Title

Rain-role notice