Originally Posted by
Nemori
The confirmation rolls work the same way as in Pathfinder - you roll again to see if you succeed or fail.
So if Geron is attacking with an attack of 14: he'd critically succeed if he rolled 1 and then 10 for example.
If Geron wants to, let's say unwind in a tavern, he's going to use his Carousing skill which is tied to Sagacity/Constitution/Strength. His Carousing is 5, SGC 10, CON 12, STR 13.
Let's say he rolls 13,10,5. He succeeds on all of those, except Sagacity, probably got a bit carried away and started ordering shots. However he can (and should) spend use the Carousing points to make up for the failed roll, he uses 3 points to get the roll down to 10, leaving him with 2 points of carousing. Which does qualify only for 1 QL. He didn't lose his face in front of his buddies, but he didn't impress anyone either.
Modifiers are applied to the all three attributes at the same time and skill points are 'spent' only for this roll.
Edit: I forgot to add that the QL (Quality level, degree of success) is calculated from the unused skill points. So there is no difference between rolling 2 and 8 (if both succeed). Rolling super low doesn't give you awesome QL, that is ultimately limited by your skill level. ie. apprentice craftsman is not going to make a masterpiece no matter how hard and how many times he tries.