It is possible, though. Even if they’re not supposed to think about it anymore, they know it is. Grinding the thought from their brain has been impossible since - since Tartarus, they want to think, but they can’t even allow that lie to themself. Since before then. Since they found out. Tartarus merely revived an old thought.

But it was just a thought.

“It is possible,” Frisk says softly. “I just promised not to.”