"It's something to do with what you're wearing," Karyn said.
Jon looked down at his dress, but couldn't figure out what was different. But then a thought came to him. "It's my dress, isn't it?"
Karyn was shocked that he actually figured it out. Because of the nature of wishes, she thought that Jon would never be able to know what had changed.
"It's a different color, right?" Jon asked.
"Huh?" Karyn asked, just now realizing that Jon hadn't figured it out after all.
"It's not supposed to be white. Is that it?" Jon asked.
"Uh ... no."
"Well, I can't figure it out then," Jon said, giving up. "Can't you give me another clue?"