Y Combinator founder Paul Graham's essays are invaluable if you want to be a part of the startup ecosystem. His latest, Startup = Growth, is required reading, and defines, once and for all, the difference between a "startup" and a "new business": [...] Starting a startup is thus very much like deciding to be research scientist: you're not committing to solve any specific problem; you don't know for sure which problems are soluble; but you're committing to try to discover something no one knew b