Jason Freedman, a reviewer for Y Combinator, shares insights from his experience evaluating 8,000 startup applications. He highlights a common misconception: that reviewers follow a consistent set of criteria, such as market size, team experience, or initial traction. Instead, he emphasizes that these factors often mislead. For instance, Airbnb was initially dismissed as a bad idea, and many successful companies like Microsoft and Apple began in small markets. He points out that a team’s experience is not always indicative of future success, citing examples like the founders of Stripe and Airbnb, who lacked direct experience in their respective fields. Freedman notes a significant finding from Y Combinator's analysis of successful companies. The most predictive question for success turned out to be about determination. This quality outperformed traditional metrics, such as intelligence or market readiness. Even if a startup starts with the wrong product or operates in an undeveloped market, a determined founder has a better chance of success. Y Combinator recognized the importance of this insight and crafted multiple ways to assess determination in applications, showing its central role in predicting which startups would thrive.