If you don't test your idea before you spend a lot of money implementing it .. you stand to lose a lot of money. It's common sense. And that's how I'd summaris

If you don't test your idea before you spend a lot of money implementing it .. you stand to lose a lot of money. It's common sense. And that's how I'd summarise much of the philosophy involved in the lean startup. -- And conversely; if you invest a lot of money in an idea without testing it, you're gambling.