2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/133292We disprove a conjecture of A. Koldobsky asking whether it is enough to compare $(n-2)$-derivatives of the projection functions of two symmetric convex bodies in the Shephard problem in order to get a positive answer in all dimensions.15 pagesMetric Geometry52A20, 52A38, 42B10text