Hmm. An entire skill? For a Fate point...
Not a whole scene, but maybe an exchange, and it'd need to be a specific skill. But yeah, I could see that. Look at Theory in Practice for SotC. That's a bit broad for the DFRPG, but having it for one other skill (like say, being able to use Scholarship for Lore at the price of a Fate Point with a Metaphysicist stunt), yeah, I could see that.