2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/130428I comment on Ulvi Yurtsever's result, which states that the entropy of a truncated bosonic Fock space is given by a holographic bound when the energy of the Fock states is constrained gravitationally. The derivation given in Yurtsever's paper contains an subtle mistake, which invalidates the result. A more restrictive, non-holographic entropy bound is derived.6 pages, LATEX, one new section and a reference addedHigh Energy Physics - Theorytext