I can't remember title/author...
What I can remember was it was about a boy who lived in a town that was completely shut off from the rest of the world. The people forbid the learnings of the outside world and taught their citizens only of what they believed. This made all the people believe they were the only civilization around. But, a boy started somehow found out that there was an outside world and he was shamed by his people. They continued to argue that he was wrong and imagining things but he kept getting pieces of the outside world and was always questioning his society..