The Customer Discovery Guide

Prepare me to do customer discovery interviews that reveal the truth.

The problem/idea I'm exploring: [DESCRIBE]
Who I'll talk to: [DESCRIBE]
What I need to learn: [DESCRIBE]

Provide:
1. The questions that uncover real problems and behaviour (about their
   past and present, not my idea)
2. How to avoid leading them or pitching (which produces polite lies)
3. How to dig into what they currently do and what it costs them
4. The signals of a real, urgent problem vs a nice-to-have
5. How to interpret what I hear without hearing what I want to

Give me questions that get honest signal, and warn me off the ones that
just get validation.