Ok, this might not work too well on the forum but we'll try it. Does anyone else know this game?
Adding Official Rules!
Person A, the Questioner, posts a picture for everyone to see.
An audience member chooses something in that picture, and puts it into a spoiler.
Everyone can look in the spoiler except Person B, the Namer.
The Questioner will ask the Namer "Is it [this]?" and the Namer will respond no until they say yes.
The audience is trying to figure out how the Namer is getting it right.