“A startup’s initial business plan doesn’t matter that much, because it is very hard to determine up front exactly what combination of product and market will result in success.

By definition you will be doing something new, in a world that is a very uncertain place. You are simply probably not going to know whether your initial idea will work as a product and a business, or not. And you will probably have to rapidly evolve your plan — possibly every aspect of it — as you go.’