Here, the text has been divided into sentences and some mistakes have been corrected: Music boy, don't you wish they had offered this class in high school? How to pass a lie-detector test when it matters most. Oh, you probably didn't go to my high school. Talk about tough, even the marching band couldn't pass through the metal detectors. You know, even if you're convinced you'll never be in a position where you'll need to take a lie detector test, you can't be sure what the future holds. Now, Kanye, this type of testing is often used by big corporations when considering applicants for a certain job or doing internal investigations on staff. The police, military, private investigators, security agencies, and intelligence services also use the polygraph to get truthful answers out of people. So, just in case you ever find yourself in the hot seat, don't you think it would be a good idea to be prepared? Oh yeah, it's absolutely possible to study for these things. All you've got to do is watch this video. Stick around to the end for a helpful bonus to know under which circumstances you can actually refuse to take the test. And before we start, go ahead and hit that big red button to subscribe to our Channel. Don't forget the notification bell either. This way, you'll always be in the know when a new video pops up on the bright side of life. So, how does a polygraph work? Well, the first lie detector was invented in 1906 by a cardiologist named Sir James McKenzie. After a few years of fine-tuning, the technology he created was developed enough to introduce to the world the polygraph machine that we know to this day. In 1992, the lie detector was computerized, which greatly contributed to...