Startups and truth seeking
Building a startup is about finding and exploiting something that is unnoticed by the world. It starts with a conjecture based on an indivudal model of the world. Where you see a creative solution to a large problem.
This is a muscle that only grows by getting good at problem-solving. It doesn't come about by just "thinking about a good startup idea" By observing, talking to people, reading, and building up intuition.
By experimentaion, negation and implementation of your ideas.