I read an article once that talked about the social advantages of lying. I find it generally difficult to lie to someone's face. I blush just at sudden public attention even when I've nothing to hide, so it's hard to feel I'd be too convincing tryin to lie. Maybe the more you do it the better you get? Or maybe it's easier to tell a big lie than a small one? Or maybe it's easier when you believe you know what's best for people to hear?

Seems like there was a Star Trek episode where Spock tricked a computer into self-destructing by saying something like "I never tell the truth." Was it the one with Harry Mudd and his robot women?