What do you think that fish is?' Sam asked Astrid. She peered closely at the alleged fish. 'I think that's an example of ,' she said. 'Yeah?' Sam made a face. 'Do you think it's okay to eat?' Astrid sighed theatrically. ' ? Inedible? Joke, duh. Try to keep up, Sam, I made that really easy for you.' Sam smiled. 'You know, a real genius would have known I wouldn't get it. Ergo, you are not a real genius. Hah. That's right. I threw down an 'ergo.'' She gave him a pitying look. 'That's very impressive, Sam. Especially from a boy who has twenty-two different uses for the word 'dude.