because Mr. Kelada considers the pearls around Mr. Rampsay's wife's neck real, but Mr. Rampsay artificial and they decide to bet. Next follows a story element - complication because as sonn as Mr. Know-all looks at the neckles he sees that it is real , but as soon as he looks at Mrs. Rampsay he says the opposite. And in such a way the author hooks our curosity because we want to find out why did Mr. Kelada does so. He was about to speak. Suddenly he caught sight of Mrs. Rampsay's face. It was so white that she looked as though she were about to faint. She was staring at him with wide and terrified eyes. Mr. Kelada was making over himself. So far Mr. Know-all had shown himself as a bad character but in the end we see that he has changed because he escaped Mrs. Rampsay by saying that the pearls were artificial. The thing that would have happened if Mr. Kelada hadn't helped Mrs. Rampsay is explained in the following sentence said by Mr. Know-All : If I had a pretty wife I shouldn't let her spend a year in NY! From this sentence we can see that Mr. Kelada was a real Mr. Known-All, because he knew how to act in situations like that. The main idea - you can't get to know a person in a short time period, not from the first impression, you need a longer period of time.