With a cc skill of above 20. Do you add the value above 20 to the roll? Or are you just rolling the d20 and the value above 20 is just there to compensate for any negative mods? For example a cc skill for 23, rolls a 15 then add the 3 to a final score of 18?
http://infinitythewiki.com/en/Attributes_Below_1 Here's the link – though the title can be a little misleading lol