There are three kinds of failure, but only one matters: intelligent failures, where you deliberately test a new idea on a small scale under a hypothesis. These are how you learn what works, the same way scientists run experiments.
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There are 3 types of failure and only one of them is good, actually. So let me start with the good one. I call these intelligent failures and they are the undesired results of thoughtful forays into new territory. I can break that down and be more definite. An intelligent failure is a failure that happens in new territory in pursuit of a goal driven by a hypothesis, or at least good reason to believe it might work. And finally, and importantly, it's as small as possible. You don't make bigger bets than you can afford. The, the reason I call it intelligent is it's literally the only way to get the information or to get the knowledge you, you want to get in pursuit of some goal. Those are intelligent failures. That's really— you could think of those as the kinds of things that, that scientists do for a living.