There is at least one goat back, because it has just served Hibiki a cup of tea (and has enough for maa-verybody, if there are other taa-kers). All the better for that teacup to rattle in Hibiki's hand, attention caught by the sudden turn the conversation has just taken.

"...Forgotten?" she asks, disturbed but doubting. "Impossible...."

So she leans in for a better look. Nothing properly exists without Shikyoin Hibiki opining about it, so she feels certain that under a genius's gaze, the solution shall absolutely -