Which assumptions could kill your idea, what to test first, and how to ask customers without fooling yourself.
Run these in order. The kill threshold is set now, before you test – if you wait until after, you'll move the goalposts.
Ask about their life and past behaviour. Never pitch, never ask hypotheticals.
Not fixes, and not advice – questions worth sitting with. If one of them stings or excites you, that's the one to explore.