Retention Cohort Hypothesis Generator Prompt

The cohort data below shows a retention drop at week {{week}}.
Generate 5 testable hypotheses for why. For each:
- State the hypothesis as "Users who X are more likely to churn because Y."
- Name the metric that would confirm or refute it.
- Name the segment to compare against.
Then pick the hypothesis most cheaply testable.

Cohort data:
{{data}}

Replace the {{fields}} with your own context and tighten the rules to match your domain.