theorem BFO.MaterialEntityOrSite.materialEntity.sizeOf_spec
theorem BFO.MaterialEntityOrSite.materialEntity.sizeOf_spec: ∀ (a : j12bzjgj.BFO.MaterialEntity), sizeOf (j12bzjgj.BFO.MaterialEntityOrSite.materialEntity a) = 1 + sizeOf a
theorem BFO.MaterialEntityOrSite.materialEntity.sizeOf_spec
theorem BFO.MaterialEntityOrSite.materialEntity.sizeOf_spec: ∀ (a : j12bzjgj.BFO.MaterialEntity), sizeOf (j12bzjgj.BFO.MaterialEntityOrSite.materialEntity a) = 1 + sizeOf a