>>/4740/
> from PHB: Arguments

"The golden rule of D&D is that the word of the DM is the final say on any matter when it comes to rules. Even if it directly goes against what it says in the Player's Handbook or Dungeon Master's Guide."

[1d20+4=20] No difference.

In the future as always, I will decide when a roll is necessary. When someone is telling the truth as they see it to a person in authority, careful wording matters. I will, at my discretion, reward her for clear thinking. This isn't a rule change, it's my choice.