Unit 2 Philosophy - Epistemology Flashcards
(168 cards)
Skepticism
What is it?
- Philosophical skepticism is a systematic approach that questions the notion that absolutely certain knowledge is possible.
- It isn’t the same as commonplace skepticism - Ie. a student says they don’t have their assignment done because “their printer is broken.”
- For the skeptics, the logical argument was impossible, as it relied on propositions which could not be said to be either true or false without relying on further propositions. This was the regress argument, whereby every proposition must rely on other propositions in order to maintain its validity.
Skepticism
Who is it?
- Pyrrho of Elis is credited with the foundation of this school of thought - He travelled to India as a young man and was taught by the gymnosophists - the naked lovers of wisdom. Then, he went back to Greece and taught that objective knowledge is impossible to have.
All judgements must be suspended. - In Islamic philosophy, skepticism was established by Al-Ghazali (1058-1111), known in the West as “Algazel”, as part of the orthodox Ash’ari school of Islamic theology
- René Descartes is credited for developing global skepticism as a thought experiment in his attempt to find absolute certainty on which to base the foundation of his philosophy. However, Descartes was not totally a skeptic and developed his theory of an absolute certainty to disprove other skeptics who argued that there is no certainty.
Ten Modes of Doubt
- The skeptics argued that there were TEN MODES OF DOUBT - ten reasons that you cannot be certain.
- They argued against all others who claimed to know things about the world with certainty
Ten Modes of Doubt - 1
- Animals are all different and perceive the world differently.
- Cats can see at night, hawks can see for miles. Dogs can smell things that to us, don’t exist. Which is truth?
Ten Modes of Doubt - 2
- Some people like some things, some like others.
- To some, coffee is delicious, but to others it is gross. Some people like the heat, others prefer cold.
- Some people drink whisky and enjoy it, while others hate it.
Ten Modes of Doubt - 3
Things appear different to our different senses. An apple may appear yellow, and taste sweet. All of our senses tell us different information, but none are duplicated. A meal make look awful, but taste delicious. You have a SINGLE sense for each form of perception. How do you know it’s correct without confirmation?
Ten Modes of Doubt - 4
Circumstantial conditions can change everything. For example, you may perceive thing differently when tired, or angry. Friends may be funny to you while you are feeling good, but annoying when you are upset.
Ten Modes of Doubt - 5
- Different groups have different practices. What is beautiful to one group, will be strange or ugly to the next.
- Some people will believe one thing is funny, but others won’t.
Ten Modes of Doubt - 6
- You never experience anything on its own, only in combination with something else.
- Example - right now, you are seeing because of the quality of lights in the ceiling. Change the lights and appearances change - which one is ‘correct’?
- Is it a brown or a red fish?
Ten Modes of Doubt - 7
- Quantities changes the nature of things. A little chocolate each day is good for you. 12 chocolate bars a day is bad for you.
- A glass of red wine a day is healthy. 7 glasses on a Monday morning is not. Are wine & chocolate healthy? It depends.
Ten Modes of Doubt - 8
- Positions and distances change the nature of things. Mountains in the distance appear smooth. The moon often appears larger than the sun. The sun appears larger as it approaches the horizon.
Ten Modes of Doubt - 9
- Some things change based on their rarity. A hurricane would be very surprising here and noted for how rare hurricanes are. In the Caribbean it would be normal.
- If you are an A+ student, you failing a test may indicate that the test was very hard. But something with a 20% failing would not indicate the same thing.
Ten Modes of Doubt - 10
- Inter-relations make things impossible to judge.
- ‘Is that heavy?’ is an impossible question to answer. Is it heavy for me? For you? For a small child?
- ‘Is the test hard?’ is also an impossible question. It depends too much on who is asking and who is answering.
Skepticism - To review:
- The skeptics were an Ancient Greek philosophical school that emphasized our inability to know anything with certainty.
- They did not say that true knowledge was IMPOSSIBLE to know, just that we cannot know it right now, using our senses or our limited understanding of the world.
- Although skepticism isn’t a popular philosophy anymore, it is an important one as people need to always question the ideas that they have and how they are acquiring them.
- The more important thing about Skepticism is the understanding that people must always question what they know, even their most cherished beliefs and ideas.
The Point of Skepticism
- The point was to encourage an active process of questioning and to not allow people to become complacent in the things that they choose to believe.
- Skeptics felt that the real enemy of knowledge and intelligence was the intellectual complacency that leads people to simply accept all the pieces of knowledge that they are given.
- QUESTION EVERYTHING - would be their motto.
Knowledge
- Most people believe that they know what knowledge is already.
- Only when you try to define it, does it become more difficult.
- So, what is true knowledge?
- The opposite of a lie? But this is circular reasoning…..because now you must define a lie by saying that it is the opposite of truth
- Throughout the ages, philosophy, art, religion, science and politics have all claimed to have ‘the truth’
Plato - What is Knowledge?
- Had an unshakable belief in the existence of unequivocal, objective and absolute truths.
- Often argued with the Sophists over their relativism.
- Knowledge is out there, and you can find it.
DT Suzuki
- Zen Buddhist philosopher
- Knowledge is derived from two sources: prajna (intuition) and vijana (reason)
- Western philosophy focuses too much on reason, and denies intuition as a valid source of knowledge in some circumstances
Fernandez-Armesto
- The truth you feel – non-rational and sensory.
- The truth you are told – by authorities, religious, secular or political.
- The truth of reason – discovered through active thought
- The truth you perceive through your senses
JTB – Justified True Belief
- Most philosophers since Plato have accepted that “knowledge” can be accurately be called ‘justified true belief’
- The concept of justified true belief states that in order to know that a given proposition is true, one must not only believe the relevant true proposition but also have justification for doing so.
- Justified - you have enough evidence to classify the information as correct
- True - the information is actually true, based on physical evidence
- Belief - you believe that the information is correct and counts as knowledge
Rationalism
Where does knowledge come from?
Rationalism would say that Knowledge and Reason are the most important sources of knowledge, and your experiences and observations are probably messed up. Reason and logic alone can lead you to knowledge.
Prominent Rationalists
Plato - The Cave and the World of Forms - access is innate, using your rational mind
Descartes - Cogito Ergo Sum, deductive reasoning, Evil Genius
Noam Chomsky - language is innate - innate knowledge = rationalism
Rationalism and the Sciences
- Rationalism started with Plato (World of Forms) but really took off during the Enlightenment and the Age of Scientific Reasoning.
- Rationalism attempts to explain how knowledge obtained through a human cognitive activity could be an objective, universal and necessary truth.
- Rationalism maintains that knowledge can be attained through reason, which serves as the source of knowledge, a precondition for truth, and a grounding for mathematical and scientific knowledge.
How Rationalists Form Knowledge
First, Rationalists believe that evidence gained through the senses, i.e. seeing, touching, tasting, hearing and smelling, is fallible, confusing and misleading. (Think of the Skeptics)
You sense things different than other people. You even perceive things differently on different days.
Second, they construct accounts of how reason in some form or other provides additional information about the world. How does our rational mind provide us with the information that we need in the world?