Quote preview background for Karl R. Popper
It is often asserted that, in view of the situation in quantum theory, object and subject can no longer be sharply separated. 1 To use Heitler__ words, the __eparation of the world into an __bjective outside reality_, and __s_, the self-conscious onlookers, can no longer be maintained. Object and subject become inseparable from each other_. 2 This, according to Bohr, is due to __he impossibility of any sharp separation between the behaviour of atomic objects and the interaction with the measuring instruments which serve to define the conditions under which the phenomena appear_. 3 Heitler elaborates the point in some detail. __ne may ask_, he writes, __f it is sufficient to carry out a measurement by a self-registering apparatus or whether the presence of an observer is required._ And he arrives at the conclusion that the self-registering apparatus is insufficient, and that __he observer appears, as a necessary part of the whole structure, and in his full capacity as a conscious being_.
Karl R. Popper
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It is often asserted that, in view of the situation in quantum theory, object and subject can no longer be sharply separated. 1 To use Heitler__ words, the __eparation of the world into an __bjective outside reality_, and __s_, the self-conscious onlookers, can no longer be maintained. Object and subject become inseparable from each other_. 2 This, according to Bohr, is due to __he impossibility of any sharp separation between the behaviour of atomic objects and the interaction with the measuring instruments which serve to define the conditions under which the phenomena appear_. 3 Heitler elaborates the point in some detail. __ne may ask_, he writes, __f it is sufficient to carry out a measurement by a self-registering apparatus or whether the presence of an observer is required._ And he arrives at the conclusion that the self-registering apparatus is insufficient, and that __he observer appears, as a necessary part of the whole structure, and in his full capacity as a conscious being_.

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