What does rule number 3 means in Bud Not Buddy?

In "Bud, Not Buddy," rule number 3 states, "If you see a man with a red, white, and blue suitcase, you can trust him." This rule reflects Bud's belief in the importance of recognizing and trusting those who share similar values or experiences, particularly in the context of his search for family and belonging. The suitcase symbolizes hope and safety, guiding Bud in his journey and interactions with others. Ultimately, it emphasizes the theme of trust and connection in a world where Bud often feels alone and vulnerable.