2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198209This essay argues that when measurement processes involve energies of the order of the Planck scale, the fundamental assumption of locality may no longer be a good approximation. Idealized position measurements of two distinguishable spin-$0$ particles are considered. The measurements alter the space-time metric in a fundamental manner governed by the commutation relations $[x_i\,\,p_j]= i\hbar\,δ_{ij}$ and the classical field equations of gravitation. This {\it in-principle} unavoidable change in the space-time metric destroys the commutativity (and hence locality) of position measurement operators.LA-UR-93-2890-REV, "honorable mention" for the 1994 Awards by Gravity Research FoundationGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theorytext