theorem BFO.MaterialEntityOrSite.materialEntity.injEq
theorem BFO.MaterialEntityOrSite.materialEntity.injEq: ∀ (a a_1 : hz46pbq2.BFO.MaterialEntity), (hz46pbq2.BFO.MaterialEntityOrSite.materialEntity a = hz46pbq2.BFO.MaterialEntityOrSite.materialEntity a_1) = (a = a_1)