The Observer In Interpretations Of Quantum Mechanics Viewed Through Systemic Functional Linguistics

Penrose (2004: 1031-2):

The consistent-histories approach is also explicitly dependent upon some notion of what an ‘observer’ might be (the notion referred to as an IGUS in the Gell-Mann–Hartle scheme). The point of view suggested by Wigner that consciousness (or perhaps living systems generally) might violate U evolution is also one which makes explicit reference to the role of the mind (or whatever constitutes an ‘observer’) in the interpretation of quantum mechanics.

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From the perspective of Systemic Functional Linguistic Theory, the conscious observer is necessary in the interpretation of quantum mechanics because it is the observer who instantiates one construal of experience as meaning from the range of potential construals identified by the wavefunction.