Arriving home, you see the cat through window, laying on the sofa, knowing it isn't allowed.

Opening the door for the gotcha moment, you see her on the stairs, nowhere near the sofa..

Seemingly just now hearing you, she yawns and stetches, as if waking up from a great sleep.
🤔

Like Schrödinger's cat, it is both on the sofa and on the stairs at the same time, until we open the door.