What does nick learn about Jordan Baker after he has spent some time with her in The Great Gatsby?

After he has been going around with Jordan Baker, who is a golf champion and plays in tournaments, Nick learns that she cheated in her first big tournament.

As Gatsby's neighbor, Nick has been extended an invitation to one of the large and lingering galas on the "blue lawns" of Gatsby's property where tents have been erected and tables set up to hold the lavish foods. While he is there, he encounters Jordan Baker again,...

After he has been going around with Jordan Baker, who is a golf champion and plays in tournaments, Nick learns that she cheated in her first big tournament.

As Gatsby's neighbor, Nick has been extended an invitation to one of the large and lingering galas on the "blue lawns" of Gatsby's property where tents have been erected and tables set up to hold the lavish foods. While he is there, he encounters Jordan Baker again, and he visits with her. After this meeting, Nick

...lost sight of Jordan Baker, and then in midsummer I found her again.

He narrates that he was not in love with her, but he was flattered to be with her because of her fame as a golf champion, whose name everyone knew. Later, Nick notices that Jordan always wears a "bored, haughty face"; such a face always hides something, he observes. That something is an incident which Nick himself recalls--Jordan had moved her ball from a "bad lie," a difficult position, in the semi-final round of a tournament. Indeed, there was almost a real scandal, but for some unknown reasons, the caddy retracted his statement, and the other witness said he might have been mistaken (Chapter 3). Further, Nick describes Jordan as "incurably dishonest," but it was something in a woman that he does not "blame deeply. I was casually sorry and then I forgot."

Later on after becoming emotionally involved with her, but disillusioned with the East Egg group, Nick wishes to return to the Midwest and disassociate himself from the East. Nick has learned that Jordan Baker is a "bad driver," meaning that she is mendacious, incurably dishonest, and he breaks off his relationship with her.