"I don't know why we're so important"

These words came from somepony, who had been through obvious answers a hundred times. She has no ideas whatsoever.

Starlight Glimmer however is the one who intends to call her out on this mistake, but she's not sure if Twilight is just forgetful or if she's spent too much time with the Princess of Trolling.

(Contains: S5 finale spoilers.)