No one, not even YC, knows for sure which ideas will succeed. But certain ideas are much more likely to succeed than others. The best way to find a startup idea is to start with a high quality problem. A lot of founders come up with an idea with this kind of thought process. They go look for a problem that they could solve with AI. That's a solution in search of a problem. And the next mistake is getting stuck on what we call tarpit ideas.