“I am a Brain in a Vat”

Why does the sentence have to be false?

Putnam’s Argument

  • Can we say: “Brains in a Vat”?
  • The idea causes a contradiction: We can only be brains in the vat within in the current simulation
  • Thus, the sentence does not represent reality but represents whatever is in the simulation
  • It follows that we are not brains in a vat


Does from that follow that we are not exposed to another form of exposure?

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