Instead of the existential quantifier Bernard Bolzano uses his notion of 'Gegenständlichkeit einer Vorstellung an sich' (objectivity of a representation in itself). This approach makes it possible for him to solve the traditional problem of the predication of existence (i.e. whether it is possible to consider existence as a standard property of individuals) in accordance with an approach common today, namely to take existence to be primarily a property ('occupation') of a corresponding representation in itself, and not a characteristic of individuals. However, Bolzano considers a property of real existence to be attributable also to particular individuals, which is essentially different from the usual practice.
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