Nicholas Laughlin's blog etc.

"... 'the Matrix possibility' is conceptually impossible. If the only reality Neo knows is entirely false, then the only criterion he has with which to judge the authenticity of the 'real' world he has been pulled into by Morpheus is therefore also false, since it's based on false evidence."

— & more along those lines in Laura Miller's review of The Matrix and Philosophy, ed. William Irwin, a collection of essays on the metaphysical issues raised by the hyper-popular sci-fi movie.