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 Macintosh team came to share Jobs's passion for making a great product, not just a profitable one. "Jobs thought of himself as an artist, and he encouraged the design team to think of ourselves that way too," said Hertzfeld. "The goal was never to beat the competition, or even to make a lot of money. It was the do the greatest thing possible, or even a little greater." He once took the team to see an exhibit of Tiffany glass at the Metropolitan Museum in Manhattan because he believed they could learn from Louis Tiffany's example of creating great art that could be mass-produced. Recalled Bud Tribble, "We said to ourselves, 'Hey, if we're going to make things in our lives, we might as well make them beautiful.'"