Spinoza on Metaphysical Doubt and the “Cartesian Circle”

This article offers an analysis and defense of the solution proposed by Spinoza to the “Cartesian circle” problem. Taking into consideration Spinoza’s sound analysis of the epistemic conditions of an authentic doubt, it will try to show, against the interpreters who maintain that Spinoza’s most explicit and consistent solution fails, that his solution offers a perfectly coherent account of the self-justification of the objective value of reason. I will also briefly indicate the intimate connection existing between Spinoza’s solution to the “Cartesian circle” problem and his conception of truth as its own standard