The brain in a vat is a recent trope; for the Enlightenment variation see https://en.wikipedia.org/wiki/Evil_demon https://en.wikipedia.org/wiki/Evil_demon [fo

The brain in a vat is a recent trope; for the Enlightenment variation see https://en.wikipedia.org/wiki/Evil_demon https://en.wikipedia.org/wiki/Evil_demon [for multiplicity of social truths, see https://en.wikipedia.org/wiki/In_a_Grove https://en.wikipedia.org/wiki/In_a_Grove (1922)]