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22 JULY 2014

Substance Dualism, Property Dualism and Mind-Body Dualism

"Consider the following three Cartesian theses:

Substance dualism: Any substance with mental properties lacks material properties and any substance with material properties lacks mental properties.

Property dualism: Mental properties and material properties are different properties.

Real distinction between mind and body: The mind and the body are numerically distinct substances.

How are these theses logically related? Substance dualism is the strongest of the three, and entails the other two. It entails the real distinction between mind and body. For the mind is a substance with mental properties, and the body is a substance with material properties. Now if the mind lacks material properties, and the body lacks mental properties, then the mind and the body cannot be the same substance. But the real distinction between mind and body does not entail substance dualism. For that mind and body are two numerically distinct substances is compatible with both of them having both mental and material properties.

Substance dualism also entails property dualism. For if a substance with mental properties lacks material properties, then mental and material properties are different properties–otherwise, a substance with mental properties would be a substance with material properties. But property dualism does not entail substance dualism. It could be that mental properties and material properties are different properties and yet a substance with mental properties is also a substance with material properties.

But the real distinction between mind and body and property dualism do not entail each other. It could be that mind and body are numerically distinct substances but mental and material properties are the same. For instance, it could be that mind and body are distinct because they have different properties: the mind has a property M that the body lacks, and the body has a property B that the mind lacks. This does not preclude that both M and B are both mental and material properties. So the real distinction between mind and body does not entail property dualism. Nor does property dualism entail the real distinction between mind and body. For even if mental and material properties are different properties, it can still be the case that the mind, which has mental properties, and the body, which has material properties, are the same substance."

(Gonzalo Rodriguez–Pereyra, pp.70–71)

Rodriguez–Pereyra, G. (2008). "Descartes's Substance Dualism and His Independence Conception of Substance". Journal of the History of Philosophy 46(1): 69–90.
Fig.1 Lucy Jones "Philosophy of the Mind Episode Two: Criticisms of Substance Dualism", YouTube.

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TAGS

bodyCartesian dualismcognitionconsciousnessdefining features of modernitydifferentiationdistinctionsdualism • epiphenomenalism • Gonzalo Rodriguez-Pereyra • introspectionlogical-analytical paradigmmaterial environmentmaterial object • material properties • material realitymaterial space • material substances • material thinkingmaterial world • mental properties • mental substance • mindmind-body dualism • mind-body problem • minds divorced of bodiesobjective knowledgeobjective realityobjectivity • other minds • parallelism • philosophical position • philosophy of mind • physical worldproperties of nature • property dualism • realm of existenceRene Descartesscientifically established objective facts • separability argument • separate thinking • solipsism • soul • subject-object orientated philosophy • subjectificationsubjective conditionsubjectivismsubjectivity • substance dualism

CONTRIBUTOR

Simon Perkins
12 MARCH 2011

Scientists revise their criteria of rationality as they enter new domains

"The conventional model of science, technology and society locates sources of violence in politics and ethics, that is, in the application of science and technology, not in scientific knowledge itself.

The fact–value dichotomy is a creation of modern, reductionist science which, while being an epistemic response to a particular set of values, claims to be independent of values. According to the received view, modern science is the discovery of the properties of nature in accordance with a 'scientific method' which generates 'objective', 'neutral', 'universal' knowledge. This view of modern science as a description of reality as it is, unprejudiced by value, can be rejected on at least four grounds.

All knowledge, including modern scientific knowledge, is built through the use of a plurality of methodologies. As Feyerabend observes:

There is no 'scientific method'; there is no single procedure, or set of rules that underlines every piece of research and guarantees that it is 'scientific' and, therefore, trustworthy. The idea of a universal and stable method that is an unchanging measure of adequacy and even the idea of a universal and stable rationality is as unrealistic as the idea of a universal and stable measuring instrument that measures any magnitude, no matter what the circumstances. Scientists revise their standards, their procedures, their criteria of rationality as they move along and perhaps entirely replace their theories and their instruments as they move along and enter new domains of research (Feyerband, 1978, p. 98).

The view that science is just a discovery of facts about nature does not get support from philosophy either. If scientific knowledge is assumed to give true, factual knowledge of 'reality as it is', then we would have to 'conclude that Newtonian theory was true until around 1900, after which it suddenly became false, while relativity and quantum theories became the truth' (Bohm, 1981, p. 4)."

(Vandana Shiva, 1990)

1). Shiva, V. (1990). 'Reductionist science as epistemological violence'. 'Science, Hegemony and Violence: A Requiem for Modernity'. A. Nandy, Oxford University Press: 314.

Paul Feyerabend, Science in a Free Society (London: New Left Books, 1978).

David Bohm, Wholeness and the Implicate Order (London: Routledge and Kegan Paul, 1981).

TAGS

analytical thinkingCartesiancultural valuesdescription of realitydiscoursediscoverydiscursive fieldepistemologyethicsfactual knowledgehierarchy of legitimacyIsaac Newtonknowledge • logical-analytical • logical-analytical paradigmmeasuring instrument • model of science • Modernmodern science • modern scientific knowledge • myth of neutralityobjectiveobjective reality • Paul Feyerband • plurality of methodologies • positivismproperties of naturerationalityreductionism • reductionist science • researchresearch methodsciencescientific knowledgescientific method • scientific options • sociology • stable knowledge • stable rationality • theorytraditiontrust • trustworthy • truthuniversal • universal knowledge • universal methoduniversal rationalityVandana Shiva

CONTRIBUTOR

Simon Perkins
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