Answer:
Disconnection from the reality of a situation is what is dramatic irony in "Oedipus Rex" by Sophocles (495 B.C.E. - 405 B.C.E.).
Specifically, dramatic irony refers to the misunderstanding of characters to the real meaning of their situations or words. For example, Theban King Oedipus says that he will identify and punish the guilty and any accessories even if they are members of his own household. He turns out to be the killer that all Thebes seeks, and his words remove all hope of pardon.