Jerry is a sympathetic character to readers because his shortcomings, as well as his strengths, are ones with which many readers can identify. Even adult readers can identify nostalgically with Jerry's youthful passion for collecting cards. Most readers like Jerry and want to see him gain maturity and correct Roger and Jerry talk about Rollie Tremaine's getting a Grover Cleveland card. When Jerry first tells Roger how Rollie acquired the the card, Roger is upset and confused. But after a few moments, Jerry tells him that it was a genuine emergency, and Roger understands. Roger knows that Jerry would not have sold the Grover Cleveland card to Rollie Tremaine unless it were really important. The exact details are not necessary because Roger accepts Jerry's explanation. As the story ends, Jerry is not particularly happy about what he had to do. He is still "waiting for the good feeling to come." However, he knows that he had no other choice, and he does not regret giving up the Grover Cleveland card.
Answer: using slang or otherwise informal language isn't trustworthy. It shows that the writer is taking the subject seriously and putting effort into their work.
