Fudged Results

ignoring or having hidden exceptions to the algorithms determining effects of actions.

The fate point system used in Warhammer Fantasy Roleplay is an example of Fudged Results that players can invoke but that the game master determines the effect of.

Fudged Results need to be made secretly by systems or Game Masters to not impede on players' possibility to have a Determinable Chance to Succeed. An exception to this is if the Fudged Result is in itself algorithmically determined which simply removes the pattern itself since players' can incorporate that algorithm into the normal one when it is noticed.

Rerolls may be seen as Fudged Results, since when to make the exceptions is in this case in the players' or Agents hands, and this can typically not be reduced to a simple deterministic algorithm.