4 Crazy Grey's Anatomy Theories Every Fan Should Know About

This is definitely a wild theory, mostly made due to the show's bad writing. The timelines for the supposed relationship between Susan and Thatcher that resulted in Lexie gets screwed up multiple times. She is supposedly born in 1984 and is a surgical intern in 2006. This would make her 22, which is way too young. This has led to a theory that she is just a figment of our imagination.