One of the core principles of lean development is the minimum viable product (MVP). But what exactly is a MVP?
Before anyone tells me that no-one designed a car by designing a skateboard first, let's not take the analogy too seriously. The key point here is that the emphasis in minimum viable product is viable, not minimum.
You can't ship a half baked product and expect people to buy it. The MVP is all about starting small, solving a problem, then iterating and developing from there as you learn about your market.