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Polysoos hc
Lee Soo Hyuk and Choi Jung Soo understand Cale the best. And they got there by painstakingly prying communication out of Cale's teeth when he was still Kim Rok Soo. They have cried tears of blood to understand Cale.
The problem lies with the fact that Cale now uses them as a standard for people understanding him. He just can't put into perspective the work they did to understand him, so he believes that he's easy to understand.