Which-Path - Observer Effect

I went this way. I went this way. I remember the door. There was no door. Do not determine the path. Two marks waiting on the wall, Two shadows where there should be one. Every road remains before me Until I say which one I've done. I left footprints through the left door. I watched myself go through the right. Both histories remain consistent While no one turns on the light. Don't ask where I was. Don't trace where I've been. The answer is the knife That cuts possibility thin. WHICH PATH? Which one carried me here? WHICH PATH? Which one disappears? If you know where I have traveled, You destroy what you could see. There were two roads through the darkness— UNTIL YOU LOOKED AT ME. Path information unavailable. Do not measure. I remember both beginnings. I remember neither end. I remember meeting someone Who remembers being me. You shouldn't be here. Neither should you. We stood between two outcomes Like reflections without glass, Afraid that recognition Would decide which one could last. Don't name the doorway. Don't follow the trace. Knowing where I came from Erases the other place. WHICH PATH? Which one carried me here? WHICH PATH? Which one disappears? Every answer leaves a body. Every certainty takes one. There were two worlds for a moment— NOW THERE'S ONLY ONE. Detector armed. Wait. Path measurement initiated. Don't— Measurement complete. Where did he go? Who? One set of footprints on the floor. One doorway in the wall. One history in the record. No evidence at all. But something in the silence Still arrives before the sound, Like another set of footsteps Walking somewhere— UNDERGROUND. WHICH PATH? Don't tell me where I've been. WHICH PATH? Don't make me choose again. Leave the question unanswered. Leave the doorway incomplete. Because somewhere in the interference THE OTHER ONE IS ME. WHICH PATH? WHICH PATH? WHICH— I remember you looking. Run it again.