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.
"The combination of a worldwide shift to GM crops and rising global temperatures led to a series of global disasters, destroying many natural resources and causing a permanent environmental imbalance. Earth’s leaders make the choice to outsource all food production to off-world corporately owned farm planets, known as ‘flatlands’." — Luke Sanger on the album Onyx Pyramid
The music, Sanger writes, is a kind of fictional soundtrack for a landscape of offworld megafarms, where a human skeleton crew has been reporting “auditory hallucinations” amplified by the effects of an artificial atmosphere. Audio scifi.