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The difficulty with a more rigorous approach might be to say that to have a 50 % of DC 10 you need skill 0 which would therefore be statistically equivalent to Skill-10, but that means that untrained skills in D&D are better than GURPS defaults by about 40-48%. So:ĭC 40 = Nearly Impossible = Impossible = -10 The easiest way is probably just compare the Task Difficultly Modifiers to the generic DC table and match similar descriptors.
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