Does this sound like pretty bizarre to anyone else? I mean, if they're a really poor liar you can probably tell - but I honestly don't know of anybody who'd be so easy to read that I could read their face to find out whether or not they were lying. I'm pretty sure I don't sound or look any different when I tell somebody a lie - I just do, and that's it. Sure, there are situations where you can tell somebody is telling a lie - if they're making up something complex and get caught in it, for instance - but that doesn't seem to be what the skills in question are about. As a result, I tend to either allow rolls off this skill very rarely, or just disallow it completely in my games.
Thoughts? Am I missing something here?