The Question and Answer section for Oedipus Rex or Oedipus the King is a great resource to ask questions, find answers, and discuss the novel.
Oedipus has a clear hamartia - or tragic flaw - which precipitates his woeful fate. in this case, it's his pride, which allows him to disbelieve the Gods and hunt the source of a plague instead of looking inside himself. That said, Oedipus'...
According to Oedipus, Teiresias has the knowledge to save Thebes. He can see the future.... he is a prophet.
Jocasta does not believe in the divine prophecy: she doubts the word of any oracle. She believes there is no such thing as fate rather that the future is based on chance and coincidence.