The unicorn had to dig real deep in the back of her head to think of anything relevant. That was the trouble with Princess Luna -- the concern many ponies had in the immediate aftermath of her dropping the mantle of 'Nightmare Moon,' and the concern many ponies still had even two years later. Most Equestrian ponies were kinda like Marcos; they only saw what she tried to do before, and what she wasn't trying to do now. And they worried it was just a simple 'switch --' a choice she'd made that she might just as easily un-make. 