What idea started growing when billie burns told bud tht he didnt know who his daddy was?

When Billie Burns told Bud that he didn’t know who his daddy was, it sparked a growing idea in Bud’s mind about the importance of family and identity. This moment deepened Bud's desire to uncover the truth about his father and understand his own background. It also intensified his feelings of abandonment and the search for belonging, which are central themes in his journey throughout the story.