[Chaos]

To be honest, I feel like rolling d20s in this system for conflicts are an extremely poor solution, unless players confirm their stats with each other before they start using rolls. Even then, there are players who will not rely on a d20 to determine their character's fate, and we are inevitably going to see some situation where there's an argument over using d20s or not. (And no, (not) using d20s has nothing to do with one's roleplay ability)

However, if I were to place in a system like this, I would just have something that goes (1d20 + Stat), without showing the stat's exact number.