Daring Do Done It

I found the premise of "Daring Don't" (4x04) absolutely far-fetched. They didn't even pick up the chance to glob comic-canon with episode-canon. Could've made Twilight's mom or at least somepony the author and then introduce Daring Do as real, but no. Daring Do is author and adventurer all in one. 

In this regard, I have deemed that Rainbow Dash lost it after she was informed of the delay and the events of the episode were all in her head. Rainbow Dash is currently seeking treatment at Ponyville Hospital.

(Comic-canon, which was in fact popular opinion debunked by Andy Price, stand falls. But other points valid.)