Lie Detector

In the essay, the author explains some methods that are used to identify if you are lying by this machine called Lie Detector. Lie detector is a great machine, but I don't think is 100% accurate. The machine was done to determine changes in a person's body. Most of the people know how the machine works, so they try to stay calm and not to get nervous. We all should try to say only the truth, but sometimes people have to deal with events that let them to say it. There is no such a person that has ever said a lie. For examples, you lay when you don't want to hurt other people's feeling or when you don't want your child to know that he/she is adopted. I believe that at some point, we all have to lie in our daily lives. The author even mention that lying is stressful, ; therefore, sometimes it is necessary to say it.