Fourth Meditation:  Truth and Falsity

Idea of Human Mind

Human Are Prone to Countless Errors

Epistemological Account For Error

Fifth Meditation:  The Essence of Material Things, and the Existence of God Considered a Second Time

Descartesís Analysis of Types of Essences

Descartes Borrows from the Proslogion of St. Anselm of Canterbury (1033-1109)

Assumption of Western Metaphysics Shared by Anselm and Descartes

Anselm and Descartes Make Existence a Predicate

Existence and the Definition of God

Definitions Do Not Establish Existence

Sixth Meditation:  The Existence of Material Things, and the Real Distinction Between Mind and Body

Difference Between Imagination and Conception

Descartesís Conclusions

Argument for Existence of Matter

Body Can Be Understand Largely As If A Machine