Once you see that an answer is not serving its question properly anymore, it should be tossed away. It's just their natural life cycle.
They usually kick and scream, raising one hell of a ruckus when we ask them to leave. Especially when they have been with us for a long time.
You see, too many actions have been based on those answers. Too much work and energy invested on them. They feel so important, so full of themselves. They will answer to no one. Not even to their initial question!
The hardest thing about customer interviews is knowing where to dig. An effective interview is more like a friendly interrogation. We don’t want to learn what customers think about the product, or what they like or dislike — we want to know what happened and how they chose... To get those answers we can’t just ask surface questions, we have to keep digging back behind the answers to find out what really happened.
A lot of people think dreams and drugs involve some magical inspiration. I think otherwise.
I rarely get inspired by dreams or drugs, but I have my own secret source of inspiration: mishearing other people. Somebody says something, I misinterpret it, and the misinterpretation is quite interesting – more interesting than anything I would have come up with on my own if asked to generate an interesting idea. Maybe it’s a clever joke or turn of phrase. Maybe it’s a neat idea. Sometimes I misunderstand people’s entire positions, and end up with positions much more interesting than the ones they were trying to push.