이이
When Seonjo asked Jeong who "the other officials" were, Jeong replied that it was Jeong Cheol and the Yun Dugu brothers, who were at the time the sole Westerners in court. Yi I was angered that Jeong had changed the words of his advice, forcing Jeong to revoke his former words by saying that though Jeong Cheol had done much wrong, he did not create a faction. He then retired to his hometown, causing the Easterners to be furious at Yi I.