Final Answer:
The boy's thoughts in the statement "For it was true, they all looked alike" suggest he might have heard this sentiment from societal stereotypes or discriminatory views prevalent in the environment.
Step-by-step explanation:
The boy's reflection on the similarity of appearance among a group of people hints at the influence of external perceptions and stereotypes. The phrase "they all looked alike" often stems from biases or generalizations based on race, ethnicity, or cultural background. The boy may have absorbed these ideas from societal narratives, media representations, or even casual conversations where such stereotypes are perpetuated.
This observation reflects the impact of societal norms and prejudices on individual perceptions, emphasizing the role of external influences in shaping one's thoughts and attitudes. It prompts a critical examination of the sources contributing to the boy's beliefs about the uniformity of a particular group's appearance.