Descartes on the objective reality of materially false ideas

Abstract

"The Standard Interpretation" of Descartes on material falsity states that Descartes believed that materially false ideas (MFIs) lack "objective reality" [realitas objectiva]. The argument for the Standard Interpretation depends on a statement from the "Third Meditation" that MFIs are caused by nothing. This statement, in conjunction with a causal principle introduced by Descartes, seems to entail that MFIs lack objective reality. However, the Standard Interpretation is incorrect. First, I argue that, despite initial appearances, the manner in which Descartes understands the proposition that MFIs are caused by nothing does not entail that they lack objective reality. Secondly, I argue that Descartes is committed to the objective reality of MFIs because of his quasi-scholastic explanation of MFIs. © 2000 University of Southern California and Blackwell Publishers Ltd.