We are all guilty of this. At least one time in your life you lied because we wanted to look honest. Researchers found that if we have to tell people something true that might make it LOOK like we're lying, we'll lie about it so it'll look true.
Here is where this can come up in your day to day life. Let's say you finish a project at your job that was suppose take 5 hours to do, but you finished in 2 hours way faster then expected you might lie and say it took longer so your boss doesn't think you cut corners.
Many people care greatly about their reputation which leads them to trying to impress others by lying to make the truth sound better.