Attractive snacks

Exploration Stage: Old Cottage
From: Rayden Storke
Description: I still don't know if the hobgoblin is really at my grandmother's house. I actually prepared a snack for the hobgoblins. They love milk, so if you put it in a cup, they will definitely come to drink it. Let's see how much milk is left in the cup I prepared yesterday.
Completed: Thank you for helping me solve this conundrum. It is true that there is still quite a bit of milk left in this cup, but I actually poured it out just to the very edge of the rim. That means the hobgoblin drank it. What was that shadowy glimpse I just saw over there? Oh, a black cat went out the window! In other words, it is reasonable to assume that it was that cat, not the hobgoblin, that drank this milk.