 Another argument given by Twardowski for the thesis that every presentation has an object is based on the different ontological status of act, content, and object of a presentation. The act and the content always exist; and, in fact, they always exist together, forming a whole in the mind, a unified mental reality, though the content has a dependent existence on the  act.[6]  The object may or may not exist. Suppose you have the following presentations: the presentation of Barack Obama, that of a possible object such as the aether, and that of an impossible object, such as a dodecahedron with thirteen sides or a round square. The objects of these presentations (namely Barack Obama, the aether, and the round square) differ greatly, but they are still all objects. Barack Obama is an existing object; the aether and the dodecahedron with thirteen sides are non-existing objects. When we present an object such as a dodecahedron with thirteen sides or a round square, the object, that which is named, is different from the content because the content exists and the object does not. It is the object, not the content, that is rejected in the negative existential judgment ‘the round square does not exist,’ for it is the object that does not exist; the content ‘exists in the truest sense of the word’ (§5, 24).