If the "vacuum" which fills space has a STRANGE MYSTERIOUS ENERGY then our description of what constitutes a "perfect vacuum" must be revised since ENERGY is NOT VACUUM and since vacuum means "absolute nothingness", one is left with the imperative of giving that STRANGE MYSTERIOUS ENERGY a "NAME" hence, whether HUMANS call it "hither" or "thither" or "ETHER" THE REALITY OF ITS EXISTENCE CANNOT BE DENIED !!