 those philosophers who speak of “existence”, “reality”, and the like are to be understood as meaning the existential quantifier, and are to be condemned as inconsistent if on this basis inconsistency appears in their writings. The justification is that no other reasonable meaning of “existence” has ever been provided (which would fit into contexts of the kind that were quoted), and the burden of providing such a second meaning of “existence” rests on those whose writings or whose philosophical views require it. (1958a [BE: 442]).