A pony is called stubborn when they refuse to change their mind no matter the persuasion against them. A pony is called persistent in hindsight when their refusal turns out to be a wise decision. "Persistence" is nothing more than what they call stubbornness when it turns out to have been for the best all along.
Pinkie Pie and Applejack may or may not be persistent, but they are most definitely stubborn.
~This is my entry for the winner of TAW's contest for rare ships. FimFic needs more ApplePie.
Now EQD Approved!