According to the author, how does the code of Liar's Poker affect a trader in the nonfiction book, Liar’s Poker: Rising Through the Wreckage on Wall Street?

The code of Liar's Poker affects a trader by making him accept all challenges. In the challenge that Gutfreund throws at Meriwether, the code of Liar's Poker is Meriwether's code, so he feels obliged to accept it.