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Redefining Reality - The Intellectual Implications of Modern Science

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Some people take the idea <strong>of</strong> a theory <strong>of</strong> everything to literally be a<br />

theory <strong>of</strong> absolutely everything, including the human mind. We<br />

know that the brain is made up <strong>of</strong> molecules and functions through<br />

electrochemical signals. <strong>The</strong> level <strong>of</strong> cells is small enough that quantum<br />

effects might be relevant to the mechanisms <strong>of</strong> the brain. If this is true,<br />

then the probabilistic elements <strong>of</strong> quantum mechanics might be relevant to<br />

understanding how the brain works; the uncertainty that accompanies them<br />

might, on the one hand, give us a purely physics-based understanding <strong>of</strong><br />

consciousness, and on the other hand, provide us with a lack <strong>of</strong> determinism<br />

that would make room for human free will.<br />

<br />

Reductionists contend that everything in the universe is made up<br />

<strong>of</strong> atoms and energy. <strong>The</strong> longstanding resistance to this claim<br />

points to the existence <strong>of</strong> life as a metaphysically different kind <strong>of</strong><br />

thing. We equate being a person with having something else beyond<br />

a body. Traditionally, this something else is a soul. This two-part<br />

picture <strong>of</strong> reality, with physical bodies and nonphysical souls, is<br />

what philosophers call .<br />

<br />

<br />

<strong>The</strong> great name attached to dualism is Descartes. With his “evil<br />

demon” thought experiment, he concluded that the mind exists<br />

separate from the body. Indeed, mind and body are completely<br />

different kinds <strong>of</strong> substances, and reality comprises two separate<br />

realms, the material world and the world <strong>of</strong> minds.<br />

<strong>The</strong> problem for Descartes is that what we want is not just mental<br />

but <strong>of</strong>ten physical. This means that these two separate realms must<br />

interact, and that is problematic.<br />

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