This philosopher asserted that the Principle of Sufficient Reason means that this is the "best of all possible worlds.
This thinker believed that Descartes's formulation of the ontological argument was invalid since it did not have a premise that a perfect being is possible. This thinker claimed that any extrinsic difference between two substances, such as a difference in spatio-temporal location, must be due to some additional intrinsic difference. This man invoked Duns Scotus' (SKOH-tuss) term "haecceity" (hack-SEE-uh-tee) to argue that something is only a substance if it has a complete individual concept in Discourse on (*) Metaphysics. This formulator of the Principle of the Identity of Indiscernibles took on the persona of Theophilus (thee-AWE-fill-us) in his chapter-by-chapter refutation of Locke entitled New Essays of Human Understanding. This philosopher asserted that the Principle of Sufficient Reason means that this is the "best of all possible worlds." For 10 points, name this author of Theodicy who co-discovered calculus.
This thinker believed that Descartes's formulation of the ontological argument was invalid since it did not have a premise that a perfect being is possible.
Gottfried Wilhelm Leibniz