  Owing to the contextuality of the properties of quantum objects, quantum
mechanics does not appear to countenance the elision of the thinking and
perceiving subject. If quantum objects owe their properties to the experimental
conditions in which they are observed, the experimental apparatus cannot owe
its properties to the quantum objects of which it is commonly said to be
composed. It follows that neither quantum objects nor measuring instruments can
be regarded as property-carriers existing independently of conscious subjects.
However, if the difference between the classical domain and the quantum domain
is understood as essentially the difference between the manifested world and
what is instrumental in its manifestation, the elision of the subject can again
be achieved.
