The colored-brain thesis

Filosofia Unisinos 22 (1):84-93 (2021)
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The “colored-brain thesis”, or strong qualitative physicalism, is discussed from historical and philosophical perspectives. This thesis was proposed by Thomas Case, in a non-materialistic context, and is close to views explored by H. H. Price and E. Boring. Using Mary’s room thought experiment, one can argue that physicalism implies qualitative physicalism. Qualitative physicalism involves three basic statements: perceptual internalism, and realism of qualia; ontic physicalism, charaterized as a description in space, time, and scale; and mind-brain identity thesis. In addition, structuralism in physics, and distinguishing the present version from that suggested by H. Feigl and S. Pepper, realism of the physical description. The “neurosurgeon argument” is presented, as to why the greenness of a visually perceived avocado, which is present in the brain as a physical-chemical attribute, would not be seen as green by a neurosurgeon who opens the observer’s skull. This conception is compared with two close views, Russellian monisms and panprotopsychism. According to the strong qualitative physicalism presented here, the phenomenal experience of a quale q is identical to a physico-chemical quality q, which arises from a combination of the materiality wassociated with the brain, and the causal organization or structure of the relevant elements of the brain S, including in this organization the structure of the self: q. The “explanatory gap” between mental and physical states is shifted to a gap between the physico-chemical qualities q and the organized materiality of a specific brain region q, and is seen as being bridged only by a set of non-explanatory postulates. Keywords: Colored-brain thesis, qualitative physicalism, mind-brain identity thesis, qualia, panprotopsychism, sensorium.



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