Definition: The branch of philosophy that studies the nature of reality and existence.
Key Question: What exists? Is the world made of only physical stuff (materialism), or are there non-physical things like thoughts and souls (dualism)?
Example: Descartes believed the mind and body were separate, while Hobbes believed only matter exists.
Definition: The study of knowledge and how we come to understand the world.
Key Question: Can we trust our senses, or could they deceive us?
Example: Descartes questioned reality, asking if an “evil demon” could be deceiving him.
Definition: The belief that things have a goal or purpose, often seen in religious or philosophical thinking.
Key Example: Aristotle believed eyes exist for the purpose of seeing. This is called “the plan” — the idea that everything has a designed purpose.
Definition: A concept that describes how events are caused by previous actions.
Key Example: A chair exists because someone built it.
Hobbes vs. Descartes:
Hobbes believed in efficient causes — things happen because of material interactions (matter and motion).
Descartes believed God could be a cause without directly interacting with the physical world.
Belief: Everything is made of matter and motion. There is no soul or non-physical entity.
Key Work: Leviathan (1651)
Key Concept:
State of Nature: Without government, people would live in constant fear and conflict.
Social Contract: People give up some freedom in exchange for security under a strong ruler.
Epistemology: Believed all knowledge comes from the senses. Thoughts are just motions in the brain.
💡 Quote Identification Clue:
If the quote talks about humans being selfish, needing authority, or avoiding chaos → Hobbes
Belief: The mind and body are two separate substances.
Mind: Thinks and has no physical location.
Body: Occupies space and follows physical laws.
Key Work: Meditations on First Philosophy
Key Concepts:
Cartesian Doubt: Doubting everything to find what is absolutely certain.
Cogito Ergo Sum: “I think, therefore I am.”
Evil Demon Hypothesis: Descartes imagined a scenario where an evil demon deceives him, leading him to doubt his senses.
Proof of God’s Existence: He argued that the idea of a perfect God must come from something real and perfect.
💡 Quote Identification Clue:
If the quote discusses doubt, thinking, the separation of mind and body, or proving God’s existence → Descartes
Belief: Criticized Descartes’ mind-body dualism.
Key Objection:
She questioned how a non-physical mind could cause a physical body to move.
Argued that interaction requires contact and extension (taking up space).
💡 Quote Identification Clue:
If the quote challenges how the mind and body interact → Princess Elizabeth
Belief: Reality is fundamentally made of minds and ideas.
Key Work: Letters to De Volder
Key Concepts:
Pre-Established Harmony: Instead of the mind and body interacting directly, God set them up to run in perfect synchronization, like two clocks ticking together.
Force: Argued that motion isn’t just a change in position but involves an internal force.
Unity and Identity: Believed true unity is not just physical closeness but a mental or conceptual unity.
💡 Quote Identification Clue:
If the quote discusses force, harmony, or the nature of unity and identity → Leibniz
Hobbes:
Talks about materialism, humans being selfish, or the need for a strong ruler.
Mentions fear, war, or the “state of nature.”
Descartes:
Discusses thinking, doubting, or proving existence.
Mentions God, the soul, or the separation of mind and body.
Princess Elizabeth:
Questions how the non-physical mind can move a physical body.
Leibniz:
Talks about force, pre-established harmony, or the unity of objects.
Fill in the Blank:
“The belief that everything is made of matter and motion is called __________.” → Materialism
“__________ said, ‘I think, therefore I am.’” → Descartes
“The concept of __________ means that things have a designed purpose.” → Teleology
Quote Identification:
“In the state of nature, the life of man is solitary, poor, nasty, brutish, and short.” → Hobbes
“I think, therefore I am.” → Descartes
“How can the soul of a human body determine the movements of its limbs?” → Princess Elizabeth
“Force is not merely the change of position but something inherent in objects.” → Leibniz
Short Answer:
Explain the main difference between Hobbes and Descartes’ views on reality.
Describe Princess Elizabeth’s objection to Descartes’ dualism.
How does Leibniz’s idea of pre-established harmony address the mind-body problem?
Understand Key Terms: If you know terms like dualism, materialism, teleology, and efficient causation, you’re already halfway there!
Recognize Philosopher Styles: Think of Hobbes as practical and harsh, Descartes as skeptical and logical, Elizabeth as critical, and Leibniz as imaginative and idealistic.
Use Process of Elimination: On quote identification questions, if it’s about doubt or thinking, it’s likely Descartes. If it’s about chaos and rulers, it’s Hobbes.
Good luck! You’ve got this! 💡
4o