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> No ones knows for sure because no one can objectively explain the nature of consciousness and the mind in the first place.

True, but I'm still waiting for a single proposal as to where a mental illness would subside other than physical structures/molecules, because the only other explanation I can think of are in the realm of the metaphysical

> The study has no control group and therefore is not objective. If you read the Methodological Issues section, you'll see that this is essentially a study of the neurochemical effects of antipsychotic drugs.

The article isn't a study/original research, it's a review based off of existing research - generally - in which brains from individuals with schizophrenia are compared to the brains of individuals without schizophrenia (controls). Antipsychotic drugs as a confounding factor is definitely an important factor in these studies though. There are however a number of factors that are are not affected by antipsychotics, notably genetics[1, 2]. Certain genetic variants strongly increase the risk of mental illnesses - by what mechanism does this work other than by translating to proteins that exert an objective, physical effect? (Note that studies on this are primarily GWAS based on large populations, not simple hereditary/familial studies in which one could argue that environmental factors were confounding)

  [1] https://en.wikipedia.org/wiki/Causes_of_schizophrenia#Genetics
  [2] https://en.wikipedia.org/wiki/Bipolar_disorder#Genetic

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