No one has a good enough memory to make a successful liar.
In the end, you're going to slip up. Maybe not today, maybe not tomorrow but you will someday. And why waste the energy and time creating a lie when the truth is probably much faster.
Have you ever been the butt end of a lie gone wrong? Did you catch the person in the act? Or did you find out after the mess unraveled?
I was involved in one today. It cost my buyers their potential dream home. Let's just say I called the liar out on it (after a slydial message) and they didn't quite know how to react. I'm still steaming over it but at least I didn't lie.