Brains in a vat

Journal of Philosophy 83 (3):148-167 (1986)
Abstract
In chapter 1 of Reason, Truth, and History, Hilary Putnam argues from some plausible assumptions about the nature of reference to the conclusion that it is not possible that all sentient creatures are brains in a vat. If this argument is successful, it seemingly refutes an updated form of Cartesian skepticism concerning knowledge of physical objects. In this paper, I will state what I take to be the most promising interpretation of Putnam's argument. My reconstructed argument differs from an argument strongly suggested by Putnam's text. I will show that the latter argument obviously does not work. The more promising argument which I reconstruct on behalf of Putnam raises some interesting questions about the relation between the contents of one's beliefs and one's environment and about how this relation affects the evaluation of anti-skeptical arguments. I conclude that my reconstructed argument ultimately fails as a response to Cartesian skepticism: the argument engenders a skepticism about knowledge of meaning, or propositional content, which undercuts its anti-skeptical force.
Keywords Analytic Philosophy  Contemporary Philosophy
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ISBN(s) 0022-362X
DOI 10.2307/2026572
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How Can We Know That We 'Re Not Brains in Vats?'.Keith DeRose - 2000 - Southern Journal of Philosophy 38 (S1):121-148.
An Argument for External World Skepticism From the Appearance/Reality Distinction.Moti Mizrahi - 2016 - International Journal for the Study of Skepticism 6 (4):368-383.
Implications and Consequences of Robots with Biological Brains.Kevin Warwick - 2010 - Ethics and Information Technology 12 (3):223-234.
In Defense of Putnam's Brains.Thomas Tymoczko - 1989 - Philosophical Studies 57 (3):281--97.

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