Lucas Against Mechanism
Lewis (David)
Source: Philosophy , Jul., 1969, Vol. 44, No. 169 (Jul., 1969), pp. 231-233
Paper - Abstract

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Author’s Introduction

  1. J. R. Lucas argues in "Lucas (J.R.) - Minds, Machines and Gödel" that his potential output of truths of arithmetic cannot be duplicated1 by any Turing machine, and a fortiori cannot be duplicated2 by any machine. Given any Turing machine that generates a sequence of truths of arithmetic, Lucas can produce as true some sentence of arithmetic that the machine will never generate. Therefore Lucas is no machine.
  2. I believe Lucas's critics have missed something true and important in his argument. I shall restate the argument in order to show this. Then I shall try to show how we may avoid the anti-mechanistic conclusion of restated argument.

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