Here's a breakdown of why it's considered an insult:
* Implies Superiority: The person saying it is positioning themselves as having more knowledge or understanding.
* Condescending: It belittles the recipient, implying they are not intelligent enough to understand something or have basic knowledge.
* Passive-Aggressive: It often avoids directly addressing the issue at hand and instead deflects with a dismissive statement.
However, the insult is often used humorously or sarcastically, especially among friends. In these contexts, it might not be intended as a serious attack on someone's intelligence.
Here are some examples of how the insult could be used:
* Serious insult: "You're wrong about that. Go read a book and learn something about it."
* Sarcastic: "Wow, you really don't know anything about that? Go read a book!"
* Humorous: "I'm not sure you understand how that works. Maybe you should go read a book."
Ultimately, the meaning of the insult depends on the context and the tone of the person saying it.