The Fate of Oedipus Rex

"Iocastê: Set your mind at rest. If it is a question of soothsayers, I tell you that you will find no man whose craft gives knowledge of the unknowable. Here is my proof: An oracle was reported to Laïos once (I will not say from Phoibos himself, but from his appointed ministers, at any rate) that his doom would be death at the hands of his own son—his son, born of his flesh and of mine! Now, you remember the story: Laïos was killed by marauding strangers where three highways meet; but his child had not been three days in this world before the King had pierced the baby's ankles and left him to die on a lonely mountainside. Thus, Apollo never caused that child to kill his father, and it was not Laïos' fate to die at the hands of his son, as he had feared. This is what prophets and prophecies are worth! Have no dread of them. It is God himself who can show us what he wills, in his own way.
Oedipus: How strange a shadowy memory crossed my mind, just now while you were speaking; it chilled my heart." (p. 978, lines 182-202)

In Oedipus Rex it is clear that fate exists and free will makes no difference in the outcome. In this passage it clearly shows that fate exists. Not only does what she say help shine a light on Oedipus's fate, but also on the fate of the town and the plague. By her saying this it makes Oedipus remember certain things and makes him delve further into the truth, culminating in the fact that he, Oedipus, did indeed fulfill the prophecy; and because Oedipus is exposed for the murderer he is, the prophecy of his expulsion can also conclude. Thus two prophecies are helped to be fulfilled and, irony of ironies, here she doesn't even believe in fate. This entire drama is filled with clues that all point toward fate existing. Free will is an illusion, something that seems to exist only as a way to get to fate's end; no matter what you do, fate always wins.