philosophy midterm Flashcards
(82 cards)
Structure of reasoning
Avaliable information -> Mental processing -> New Information (inference) -> New position/knowledge/belief
- Last step: Provide reasoning to others through a philisophical argument
Two main types of arguments
- Inductive: It’s PROBABLE that it’s true. Can’t be definitively proven, but can come to a general consensus. Non-conclusive
- Deductive: Certain conclusion. If the reasons are true, the conclusion MUST also be true. Undeniable conclusion
Inductive argument
- Goes beyond the given information
- AMPLIATIVE
- It’s either a strong or weak argument
- The conclusion of a strong inductive argument is LIKELY true
- If it’s premises are true, or very probably true, the argument is COGENT
- To be cogent, an argument must be inductively strong and have true/probably true premises
- Test of strength: To what extent does the truth of these premises suggest the truth of the conclusion?
Deductive Argument
- Extracts information that’s given in the premises.
- Tells us nothing more than what is given in the premises but rearranges or reveals it in a way that might be more useful/revealing
- When an argument succeeds in providing conclusive support for its conclusion, the argument is VALID (Deductively valid)
- We can’t accept an argument just because it’s valid, the premises must also be true
- An argument that’s deductively valid with true premises is SOUND
Soundness in deductive arguments
- There are two conditions
- It must be deductively valid
- The premises must be true
- An argument can be unsound when
- It may have false premises
- It’s deducively invalid
Descartes Meditations Objectives
- To explain why we can doubt all things, especially material things
- To establish a secure foundation for the sciences, which will erase or minimize the doubt
- It makes it impossible for us to doubt things that are true
Meditation 1- Descartes, the senses and 2 types of beliefs
- Descartes beliefs fall into 2 categories
- Beliefs that are definetly true, and beliefs that are probably true (therefore doubtful)
- Descartes tries to find a way to eliminate doubtful beliefs
- To do this, he deconstructs all his doubtful beliefs and reconstructs them in a way that leaves no room for doubt
- Knowledge from our senses can be set aside because the senses often decieve us and therefore can’t be trusted
Meditation 1- Descartes, primary qualities
- Descartes sets aside sensory experience, but not the primary qualities (Galileo)
- The primary qualities are size, figure, position, motion, and quantity. They’re inherent to the object and not dependent on sensory input
Meditation 1- Descartes, the sciences
- Descartes sets aside the complex sciences of physics, chemistry, and biology
- He keeps the abstract sciences of math and geometry
- He also assumes that he doesn’t have any senses or a body, because what if he’s being decieved by a demon that claims to be god
Meditation 2- Descartes, God and such, one thing he knows for sure
- Descartes tries to identify one thing he can know for certain
- The existence of God? God gave him all his thoughts so he must exist, but that’s not sufficient proof
- If there is nothing in the universe, does that mean he too doesn’t exist? What if the being that’s pretending to be God is trying to trick him?
- “He will never succeed in making me nothing, as long as I am aware that I am something”
- I think therefore I am.
- But that is not sufficient proof of God
Meditation 2- Descartes, “I”
- What is this “I” that Descartes keeps mentioning?
- He is something real that thinks and exists, but what is this thing?
- He is a thinking thing
- Someone that doubts, understands, affirms, denies, is willing, unwilling, imaginative, and perceptive
Meditation 3- Descartes, proving the existence of God, different types of though
- Descartes tries to prove the existence of God by proving the existence of at least one thing besides himself
- Distinguishes different kinds of thoughts
- Ideas (mental images of things, can’t be false because they are just themselves)
- Judgments (Can’t be true or false, an error is that he judges ideas on how similar they are to the things located outside of himself)
- Decides to focus on judgments
Meditation 3- Descartes, ideas and objects of ideas/Mode and substance
- He distinguishes between ideas, and objects of ideas
- Substance: Anything that exists independently, a thing that has properties (a ball). For every substance, there is one property that it can’t exist without.
- Mode: The quality/property of the thing (colour of the ball)
- The MODE depends on the SUBSTANCE for exsitence
- The substance’s existence is independent from the mode
- IDEAS are Modes of the mind. Whatever you’re thinking about is the mode of that mind
Meditation 3- Descartes, levels and existence of reality
- The highest degree of reality is infinite substances (God)
- Medium degrees of reality are finite substances (Trees, animals, buildings, etc)
- Modes are the lowest degree of reality
Meditation 3- Descartes, Formal reality vs. Objective reality
- The formal reality of something is the same as its degree of reality
- The objective reality of something is the same level of formal reality as its object (only ideas have objects) (Ex. Red, Flat, Smooth as concepts)
Meditation 3- Descartes, Argument for the existence of God
- He exists as a thinking thing that has ideas
- Among the ideas are corporeal things and the idea of God
- It’s possible that he made up the idea of corporeal things (lower degree of reality) but not the idea of God (higher degree of reality)
- Because God has a higher degree of reality and therefore he couldn’t come up with the idea on his own and it would have to be placed there by something bigger than himself (God)
John Locke, Human Understanding
- Locke opposes that some contents of the mind precede experience
- Claims that the mind starts off as a blank slate and everything comes from experience or elements of experience
- Our observation of external, senseible objects, combined with the internal operations of our minds is what supplies our understanding with the materials of thinking
Human Understanding- Locke, Source of Knowledge
- Two sources
1. Objects of sensation
2. Operations of the Mind (reflection)
Human Understanding- Locke, Objects of sensation
- Senses convey ideas into our minds
- The source of most of the ideas we have depend entierly on our senses and, derived by them, we come to the understanding of sensation
Human Understanding- Locke, Operations of the Mind
- The perception of the operations of our own mind within us, as it’s employed about the ideas it has
- The operation of the mind produces new ideas which do not come from outside (inferences)
- Any time there’s an interaction between our senses and an external sensation, an idea is produced in the mind
- It’s important to distinguish between ideas and the sensations as they exist in the mind, vs. the external objects that produce the sensations
- Objects produce Ideas and innate qualities of the things
Human Understanding- Locke, Qualities in objects
- There are two
Primary qualities produce simple ideas - They’re qualities that are inseprable from the object, no matter what happens to it
- Solidity, extention, motion/rest, number, or shape
Secondary Qualities of bodies - Colours, sounds, tastes, smells, textures (things conveyed by the senses)
- Mind dependent qualities
Human Understanding- Locke, Simple ideas
- Come directly from sensation and reflection
- Can not be broken down any simpler
- They are put into the mind involuntatily as we interact with external objects
- Involve 3 distinct activities of the mind
Human Understanding- Locke, Complex ideas
- Produce complex ideas in 3 different ways
1. Combining ideas formed by bringing together 2 or more simple ideas
2. Relating ideas: The ideas aren’t string together, we only describe the relationship between them, but they remain seprate
3. Abstracting from ideas: Extracting a common feature shared by many ideas
Human Understanding- Locke, Substances
- Formed by the minds activity of combining simple ideas
- Results in things that exist independently of anything else
- Ex. Humans, Cows, Tables, Trees
- If we look at any substance such as gold or diamonds, the observable qualities come together to form one complex idea, but Locke claims that we don’t have any grounds for drawing these inferences