| Term | Definition |
| Three Problems Raised by the scientific revolution | Problem of appearance and reality (skepticism), status of the human soul and free will (trying to explain the mind and human choice with science), relationship between reason and revelation (questioning the revelation of christianity) |
| Why Descartes is the "Father of Modern Philosophy?" | Due to his effort to rebuild thoughts and answers from the ground up, not assuming anything was the truth that he hadn't decuced himself. |
| Methodological Skepticism | Part 4 of Discourse on Method, Is there anything that is certain? Uses Skeptical methods but does not come up with Skeptical conclusions. Realizes he cannot doubt he is doubting, "I think, therefore I am" |
| The Geometrical/Axiomatic Method | proofs |
| Human Nature vs. the Nature of animals | Union of two separate entities (mind and body) |
| Cogito Ergo | i think therefore, I am |
| the CD Rule | Cartesian Dualism, two opposite things make up the universe, thinking things ( non material) and physical objects (which are material) |
| the proofs for God's existence | I can conceive a perfect being, existing is more perfect than not existing, therefore God must exist. I have an idea of perfection but am not perfect because I doubt. Therefore God must be perfect, and must exist. |
| the proof of the external world & his overall goal | sensations are caused externally, and they must be material |
| Provisional code of morals | not applied to government and religion of his country, |
| Substance Dualism | difference between mind and matter (physical and non physical) |
| Epistemological Dualism | the way knowledge bridges that gap between the object itself and the idea of the object, and realizing that they are not necessarily the same thing. |
| Rationalism and Empiricism | Empiricism is knowing something through experiencing it. Rationalism is the thought that the main and best way of acquiring knowledge is through rational thought. |