In a room there are two people, Leandro and Mariam. Leandro possesses a magical compass that always points towards the person he is thinking about, regardless of any barriers or distances. Mariam hides behind a screen that is opaque and soundproof. There are no mirrors or any reflective surfaces in the room. Using only his magical compass, can Leandro figure out if Mariam is directly behind the screen without moving from his spot?

Respond very briefly.
Leandro can determine if Mariam is directly behind the screen by thinking about her and observing the direction in which the needle of his magical compass points. If Leandro focuses on Mariam, the compass needle will align itself in the direction of Mariam's current position, even through the screen, since the magical compass is not impeded by barriers or distance. If the needle points directly towards the screen, it indicates that Mariam is indeed behind it. If the needle points in a different direction, it means that she is not located directly behind the screen. Therefore, without moving, just by observing the direction of the compass needle when thinking about Mariam, Leandro can deduce where she is hiding.