So lets say you have a NPC trying to feed a line of BS over a player who has Nobody's Fool. Generally the game engine encourages the player to roll wherever possible instead of the GM rolling. So in instances like this, it's the player roll the Discipline against the lie vs the GM rolling the deception to weave the lie - fair enough.
However, the talent Nobody's Fool says "The difficulty of any Charm, Coercion or Deception checks attempted against the character is upgraded once for each rank of Nobody’s Fool." - upgrading the difficulty of slipping BS past. Would it be reasonable then, if we're having the player roll - to allow the player to downgrade the difficulty instead?