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<blockquote data-quote="Guest 6801328" data-source="post: 7585493">Can't...stay...away...Yes, this.&nbsp; In spades.&nbsp; I mean, read the description of insight again:Where in there does it say &quot;know if they are lying&quot;?&nbsp; It doesn't.&nbsp; It allows you to determine their intentions.&nbsp; That's not the same as knowing if they are truthful.This makes it harder (for the DM) to use well than other skills.&nbsp; It might take some quick thinking on the DMs part to come up with something on the fly (which is why maybe it's a good reason to prep this kind of stuff as much as possible) but success at Insight should provide a clue to the motivations of an NPC, not act as a lie detector.And, anyway, humans (and by extension other PC races) cannot detect lies in strangers.&nbsp; A lot of cops think they can, but they are wrong.&nbsp; We can glean clues that lead us to suspect whether somebody is lying or not, but we can never know with 100% certainty.&nbsp; (And likewise for truth: we suspect, we don't know.)&nbsp; Which means if we really wanted a &quot;detect lie&quot; skill it should be some kind of blind roll with the possibility of both false positives and false negatives.*I could almost imagine/accept an Int based skill that you can use to catch somebody in a lie, through advanced interrogation techniques.&nbsp; But that could possibly give you false positives (e.g., the person is lying but has managed to avoid contradictions).&nbsp; And, like a friends spell, it would have a good chance of pissing off anybody you used it on.</blockquote>

[QUOTE="Guest 6801328, post: 7585493"] Can't...stay...away... Yes, this. In spades. I mean, read the description of insight again: Where in there does it say "know if they are lying"? It doesn't. It allows you to determine their intentions. That's not the same as knowing if they are truthful. This makes it harder (for the DM) to use well than other skills. It might take some quick thinking on the DMs part to come up with something on the fly (which is why maybe it's a good reason to prep this kind of stuff as much as possible) but success at Insight should provide a clue to the motivations of an NPC, not act as a lie detector. And, anyway, humans (and by extension other PC races) cannot detect lies in strangers. A lot of cops think they can, but they are wrong. We can glean clues that lead us to [I]suspect[/I] whether somebody is lying or not, but we can never [I]know[/I] with 100% certainty. (And likewise for truth: we suspect, we don't know.) Which means if we really wanted a "detect lie" skill it should be some kind of blind roll with the possibility of both false positives and false negatives.* I could almost imagine/accept an Int based skill that you can use to [I]catch[/I] somebody in a lie, through advanced interrogation techniques. But that could possibly give you false positives (e.g., the person is lying but has managed to avoid contradictions). And, like a [I]friends[/I] spell, it would have a good chance of pissing off anybody you used it on. [/QUOTE]

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