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Modeling Uncertainty
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<blockquote data-quote="ClearlyTough69" data-source="post: 7006881" data-attributes="member: 6864123"><p>The example I was talking about was this:</p><p></p><p></p><p></p><p>The guard is indeed lying, so it's a contest between the character's Insight and the guard's Deception. </p><p></p><p>The character's check result is 20 (natural 15, +5 Insight); the guard's check result is 7 (natural 7, 0 Deception modifier). On the face of it, the character detects that the guard is lying; her degree of success is 13 (20-7).</p><p></p><p><em>Assessment = d20 + degree of success OR - degree of failure</em></p><p>In this case = natural 4 +13 = 17.</p><p>This meets the threshold of 10, so the character makes an accurate assessment of the outcome of the check: she <em>believes </em>the guard is lying.</p><p></p><p><em>Confidence = d20 + degree of success/ failure</em></p><p>In this case = natural 12 +13 = 25.</p><p>This exceeds the threshold for absolute certainty, so the DM reports that the character is <strong>absolutely certain that the guard is lying</strong>.</p><p>__________________</p><p></p><p>Now I'll swap the dice rolls for the initial skill contest:</p><p></p><p>The character's check result is 12 (natural 7, +5 Insight); the guard's check result is 15 (natural 15, 0 Deception modifier). On the face of it, the character has failed the contest and does not detect that the guard is lying; her degree of failure is 3 (15-12).</p><p></p><p><em>Assessment = d20 + degree of success OR - degree of failure</em></p><p>In this case = natural 4 -3 = 1.</p><p>This does not meet the threshold of 10, so the character makes an erroneous assessment of the outcome of the check: she <em>believes </em>the guard is not lying.</p><p></p><p><em>Confidence = d20 + degree of success/ failure</em></p><p>In this case = natural 12 +3 = 15.</p><p>This exceeds the threshold for being fairly sure, so the DM reports that the character is <strong>fairly sure that the guard is being truthful</strong>.</p><p>__________________</p><p></p><p>Note how the difference in the character's and the guard's skill modifiers resulted in a significant difference in the degree of success/ failure of 16 (13 - -3). This answer's /u/Elfcrusher 's requirement for these modifiers to tell in this kind of mechanic.</p></blockquote><p></p>
[QUOTE="ClearlyTough69, post: 7006881, member: 6864123"] The example I was talking about was this: The guard is indeed lying, so it's a contest between the character's Insight and the guard's Deception. The character's check result is 20 (natural 15, +5 Insight); the guard's check result is 7 (natural 7, 0 Deception modifier). On the face of it, the character detects that the guard is lying; her degree of success is 13 (20-7). [I]Assessment = d20 + degree of success OR - degree of failure[/I] In this case = natural 4 +13 = 17. This meets the threshold of 10, so the character makes an accurate assessment of the outcome of the check: she [I]believes [/I]the guard is lying. [I]Confidence = d20 + degree of success/ failure[/I] In this case = natural 12 +13 = 25. This exceeds the threshold for absolute certainty, so the DM reports that the character is [B]absolutely certain that the guard is lying[/B]. __________________ Now I'll swap the dice rolls for the initial skill contest: The character's check result is 12 (natural 7, +5 Insight); the guard's check result is 15 (natural 15, 0 Deception modifier). On the face of it, the character has failed the contest and does not detect that the guard is lying; her degree of failure is 3 (15-12). [I]Assessment = d20 + degree of success OR - degree of failure[/I] In this case = natural 4 -3 = 1. This does not meet the threshold of 10, so the character makes an erroneous assessment of the outcome of the check: she [I]believes [/I]the guard is not lying. [I]Confidence = d20 + degree of success/ failure[/I] In this case = natural 12 +3 = 15. This exceeds the threshold for being fairly sure, so the DM reports that the character is [B]fairly sure that the guard is being truthful[/B]. __________________ Note how the difference in the character's and the guard's skill modifiers resulted in a significant difference in the degree of success/ failure of 16 (13 - -3). This answer's /u/Elfcrusher 's requirement for these modifiers to tell in this kind of mechanic. [/QUOTE]
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