Founders must persuade others of their vision before concrete evidence exists, requiring both conviction and openness to change. Curiosity serves as a crucial business advantage, enabling learning from unexpected observations that others might ignore. Startups inherently encounter unforeseen events, such as surprising user behaviors, product discoveries, or differing team perspectives. Embracing curiosity transforms these moments from obstacles into valuable informational signals. Companies often lose their curiosity when defending initial decisions becomes paramount, hindering the ability to adapt to new information. This defensiveness, while creating a sense of stability, causes potentially vital feedback to be dismissed. The author shares an experience of misjudging product onboarding due to internal familiarity, necessitating a customer-centric rethink. Developing habits that foster curiosity is essential for continuous learning and adaptation. Keeping a notebook of interesting ideas and reviewing them helps refine thoughts. Documenting assumptions and potential evidence for changing one's mind provides a framework for objective evaluation. Considering alternative explanations for observed behaviors can lead to significant product insights. The AI Passport launch revealed customer interest beyond initial assumptions, highlighting the need to understand user motivations in context. Ultimately, sustained curiosity is vital for founders to learn from others, remain open-minded, and evolve their thinking throughout their entrepreneurial journey.