XYZ replaces H2O in a thought experiment formulated by this man.
This man proposed multiple realizability in his arguments against brain state theory. He countered many of his previous ideas in Representation and Reality. This thinker argued for the reality of mathematics in an indispensability thesis named for him and Quine. In the 1950s, he compared minds to computers in his theories on functionalism. XYZ replaces H2O in a thought experiment formulated by this man. He argued that we cannot be brains in a vat and argued against linguistic internalism and for externalism, which he illustrated by creating a thought experiment in which two worlds are exactly the same except for one minute difference. For 10 points, name this American philosopher known for his Twin Earth thought experiment.
This man proposed multiple realizability in his arguments against brain state theory.
Hilary Whitehall {Putnam}