2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91250We examine certain pasts and presents in the classically forbidden region. We show that for a given past the trajectory representation does not permit some presents while the Copenhagen predicts a finite probability for these presents to exist. This suggests another gedanken experiment to invalidate either Copenhagen or the trajectory representation.4 pages REVTEX4. No figures. Submitted to "Proceedings for the Eighth International Wigner Symposium" (WYGSYM 8), 27-30 May 2003, CUNY, NY, NYQuantum PhysicsHigh Energy Physics - Theorytext