The central line is, "Does it immediately interest our most likely customers? And if it doesn’t, there’s a problem. And it might not be worth working on it at a

The central line is, "Does it immediately interest our most likely customers? And if it doesn’t, there’s a problem. And it might not be worth working on it at all, or starting again." But "starting again," isn't exactly "giving up." You don't always know your most likely customers (look at boomers on Facebook), or what your product is going to be (consider Google's humble origins). And just because you're not on a trajectory to be the next Facebook or Google (or even Dogster) doesn't mean you don't have a potent service for an important niche market. At each level of your StartUp's development feedback is important - but feedback is just for steering.