In "The Lightning Thief" by Rick Riordan, a character named Mr. D questions the narrator about his familiarity with the game pinochle. The narrator admits he does not know how to play, which prompts Mr. D to express his disappointment. He emphasizes the importance of the game by comparing it to other notable activities, indicating that understanding its rules is essential for any civilized young man.

The exchange highlights a theme in the story regarding social expectations and knowledge. Mr. D's reaction suggests that games and pastimes serve not only as entertainment but also as a measure of one's character and societal standing. Through this interaction, Riordan illustrates the humorous, yet serious, undercurrents of belonging and cultural literacy among different characters.