As eitally points out, your prompt leaves open the possibility that the mirror writing is on the other side of the door (which would make no sense). So technically you underspecified the prompt?
The mirror writing IS on the other side of the door. That’s exactly the point since it’s a glass door.
I thought of this question after coming across this exact scenario as I walked up to a glass door.
It’s not some pretend scenario. Often, when you approach a glass door, there is writing intended for the person on the other side, which appears to you as mirror writing.
I wondered if chat gpt could figure that out, and to my great surprise it could. That to me formed a new benchmark in my mind of how much of a world model it must have to figure that out.
The point of these AIs is that they don't need precise programming like a computer and that they understand real human language, which is imprecise but has general conventions and simplifying assumptions to make communication easier.
It's not a trick question because it's very clear what the key thing to think about it, the mirrored writing. A trick question would be something that's trying to divert your attention elsewhere with a red herring.
