External-world skepticism
also Cartesian skepticism, simulation hypothesis
The challenge, from Descartes's evil demon to the modern simulation hypothesis, that a mind-independent external world cannot be strictly proven from the inside of experience alone — a limit most respond to by disclosed, defeasible trust rather than refutation.
Sources
- René Descartes, Meditations on First Philosophy, Meditation I
- Stanford Encyclopedia of Philosophy, "The Problem of the External World"