What matters is how you determine that user feedback actually indicates a lack of interest.
Shear mentions in the lecture that you should avoid directly asking about features or your product. "You want to learn about what's already in their heads. You want to avoid putting things there." That pretty much precludes doing things like describing your idea for TiVo/Uber to people and asking what they think. Instead, it would make more sense ask about pain points. If all of your interviews indicate that people absolutely adore the process of finding, hailing, riding in, and paying for taxis, then you'd be more justified in determining that there's a lack of interest in something like Uber.
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What matters is how you determine that user feedback actually indicates a lack of interest.
Shear mentions in the lecture that you should avoid directly asking about features or your product. "You want to learn about what's already in their heads. You want to avoid putting things there." That pretty much precludes doing things like describing your idea for TiVo/Uber to people and asking what they think. Instead, it would make more sense ask about pain points. If all of your interviews indicate that people absolutely adore the process of finding, hailing, riding in, and paying for taxis, then you'd be more justified in determining that there's a lack of interest in something like Uber.