The real distinction between essence and existence, and that between form and matter, which served for so long as the basis of metaphysics, Hobbes identifies as "the Error of Separated Essences." The words "Is, or Bee, or Are, and the like" add no meaning to an argument nor do derived words such as "Entity, Essence, Essentially, Essentiality", which "are the names of nothing" but are mere "Signes" connecting "one name or attribute to another: as when we say, ""a man is a living body"", we mean not that the "man" is one thing, the "living body" another, and the "is", or "being" a third: but that the "man", and the "living body", is the same thing; ..." Metaphysiques, Hobbes says, is "far from the possibility of being understood" and is "repugnant to natural reason."