Philosophy Lecture 02


Published on

Published in: Education, Spiritual
  • Be the first to comment

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Philosophy Lecture 02

  1. 1. Introduction to Philosophy IS-VNU Mr. Mike Lecture 2
  2. 2. Pre-Socratics <ul><li>Philosophers prior to Socrates </li></ul><ul><li>Some Contemporaries of Socrates who were not influenced by his teaching </li></ul><ul><li>Beginning of Western Philosophy </li></ul>
  3. 3. Questions of Pre-Socratics <ul><li>Is the universe ONE or MANY ? </li></ul><ul><li>What is the basic SUBSTANCE of the world? </li></ul><ul><li>Is CHANGE possible or an illusion? </li></ul><ul><li>What is the relationship between Mathematics , Reason and the world? </li></ul>
  4. 4. Thales <ul><li>Father of Western Philosophy </li></ul><ul><li>Greek – Lived in the town of Miletus in Asia-Minor (modern-day Turkey) </li></ul><ul><li>Didn't assume knowledge based on authority or religion </li></ul><ul><li>Thoughts based on observation and reflection </li></ul>
  5. 5. Thales <ul><li>Basic Ideas of Thales </li></ul><ul><li>Everything is made of a single element </li></ul><ul><li>The basic element is WATER </li></ul><ul><li>The earth is floating on water </li></ul>
  6. 6. Pythagoras <ul><li>Greek Mathematician </li></ul><ul><li>Pythagorean Theorem: The sum of the areas of the two squares on the legs (a) and (b) equals the area of the square on the hypotenuse (c). </li></ul><ul><li>Head of a religious cult which was heavily influenced by mathematics </li></ul><ul><li>Numbers are the true nature of reality </li></ul>
  7. 7. Pythagoras <ul><li>Philosophical Questions </li></ul><ul><li>Do humans have a soul? </li></ul><ul><li>What happens after physical death? </li></ul><ul><li>Is there a power or being greater than the Cosmos (universe)? </li></ul><ul><li>Is the Cosmos orderly or chaotic? Why? </li></ul>
  8. 8. Pythagoras <ul><li>First thinker to use mathematics in philosophy </li></ul><ul><li>Believed that the cosmos is saturated with structure (therefore saturated with mathematics) </li></ul><ul><li>Intelligent Design – Structure of Cosmos is evidence of an “Intelligence” behind the Cosmos </li></ul>
  9. 9. Pythagoras <ul><li>Nature is full of geometrical shapes. </li></ul>
  10. 10. Pythagoras Nature is full patterns and organization. <ul><li>Daily Sunrise and Sunset </li></ul><ul><li>Four Repeating Seasons </li></ul><ul><li>Birth – Growth – Death </li></ul><ul><li>Ocean Waves and Tides </li></ul><ul><li>Flocks of Birds </li></ul>
  11. 11. Pythagoras <ul><li>Compare Nature and Man-made things </li></ul>
  12. 12. Pythagoras <ul><li>Transmigration of Souls </li></ul><ul><li>The soul survives physical death. </li></ul><ul><li>The soul moves (transmigration) to a new physical body after death. </li></ul>
  13. 13. Xenophanes <ul><li>Questions </li></ul><ul><li>What is reality? </li></ul><ul><li>Can humans know reality? </li></ul><ul><li>What is God like? </li></ul><ul><li>Is there One God or many gods? </li></ul>
  14. 14. Xenophanes <ul><li>Reality and Knowledge </li></ul><ul><li>“ as for certain truth, no man has known it, </li></ul><ul><li>Nor shall he know it, neither of the gods </li></ul><ul><li>Nor yet of all the things of which I speak... </li></ul><ul><li>For all is but a woven web of guesses.” </li></ul>
  15. 15. Xenophanes <ul><li>Reality and Knowledge </li></ul><ul><li>Reality – There actually exists a truth of reality </li></ul><ul><li>Knowledge – Humans are unable to know it with certainty </li></ul><ul><li>Contemporary philosophies of Critical Rationalism (Karl Popper) and Critical Realism (Roy Bhaskar) hold similar views. </li></ul>
  16. 16. Xenophanes <ul><li>God(s) </li></ul><ul><li>But if cattle and horses and lions had hands </li></ul><ul><li>or could paint with their hands and create works such as men do, </li></ul><ul><li>horses like horses and cattle like cattle </li></ul><ul><li>also would depict the gods' shapes and make their bodies </li></ul><ul><li>of such a sort as the form they themselves have. </li></ul><ul><li>... </li></ul><ul><li>Ethiopians say that their gods are snub–nosed [σιμούς] and black </li></ul><ul><li>Thracians that they are pale and red-haired. </li></ul>
  17. 17. Xenophanes <ul><li>God(s) </li></ul><ul><li>Since humans really can't know the gods they have made them up in their own image. </li></ul><ul><li>Possibly the first Monotheist in Western Philosophy </li></ul><ul><ul><li>Development of the concept of a &quot;one god greatest among gods and men&quot; </li></ul></ul><ul><ul><li>God is abstract </li></ul></ul><ul><ul><li>God is universal </li></ul></ul><ul><ul><li>God is unchanging </li></ul></ul><ul><ul><li>God is immobile </li></ul></ul><ul><ul><li>God is always present </li></ul></ul>
  18. 18. Heraclitus <ul><li>Questions </li></ul><ul><ul><li>Is there anything that doesn't change? </li></ul></ul><ul><ul><li>What are opposites? </li></ul></ul><ul><ul><li>What is the primary element of the universe? </li></ul></ul><ul><ul><li>What is the principle order of knowledge? </li></ul></ul>
  19. 19. Heraclitus <ul><li>Everything is Flux </li></ul><ul><li>The only constant thing in the universe is change </li></ul><ul><li>“ You can't step into the same river twice” </li></ul><ul><li>Vocabulary </li></ul><ul><li>Flux – constant change </li></ul>
  20. 20. Heraclitus <ul><li>Activity: </li></ul><ul><li>Is this mountain trail going UP or DOWN ? </li></ul>
  21. 21. Heraclitus <ul><li>Activity: </li></ul><ul><li>Is this glass of water half-empty or half-full ? </li></ul>
  22. 22. Heraclitus <ul><li>Activity: </li></ul><ul><li>Is money Good or Evil ? </li></ul>
  23. 23. Heraclitus
  24. 24. Heraclitus <ul><li>Unity of Opposites </li></ul><ul><ul><li>The way Up is Down </li></ul></ul><ul><ul><li>Half-full is half-empty </li></ul></ul><ul><ul><li>Money is Good and Evil </li></ul></ul><ul><ul><li>Similar to concept of Yin-Yang </li></ul></ul>
  25. 25. Heraclitus <ul><li>Fire is the Primary Element </li></ul><ul><ul><li>3 Principle Elements – Fire , Earth and Water </li></ul></ul><ul><ul><li>Fire is the Primary Element because it controls and changes the other two </li></ul></ul><ul><ul><li>The Cosmic Fire is the center of the cosmos. Human souls come from it and return to it after death. </li></ul></ul>
  26. 26. Heraclitus <ul><li>Logos </li></ul><ul><li>“ This Logos holds always but humans always prove unable to understand it, both before hearing it and when they have first heard it. For though all things come to be in accordance with this Logos , humans are like the inexperienced when they experience such words and deeds as I set out, distinguishing each in accordance with its nature and saying how it is. But other people fail to notice what they do when awake, just as they forget what they do while asleep.” </li></ul><ul><li>“ For this reason it is necessary to follow what is common. But although the Logos is common , most people live as if they had their own private understanding.” </li></ul>
  27. 27. Heraclitus <ul><li>Logos </li></ul><ul><ul><li>Principle order of all knowledge and existence </li></ul></ul><ul><ul><li>The link between rational discourse and the rational structure of the world. </li></ul></ul><ul><ul><li>Logos has an independent existence and is universal </li></ul></ul><ul><ul><li>Possibly a divine entity </li></ul></ul>
  28. 28. Parmenides <ul><li>Questions </li></ul><ul><ul><li>What is the nature of reality? </li></ul></ul><ul><ul><li>Is change possible? </li></ul></ul><ul><ul><li>Can you trust your sensory perceptions? </li></ul></ul><ul><ul><li>What is the Logos? </li></ul></ul>
  29. 29. Parmenides <ul><li>Discussion: </li></ul><ul><li>Do Unicorns Exist? </li></ul><ul><li>Why? Why not? </li></ul><ul><li>What is Existence? </li></ul><ul><li>What is Real? </li></ul>
  30. 30. Parmenides <ul><li>Do Unicorns Exist? </li></ul><ul><li>Parmenides believes that unicorns do exist </li></ul><ul><li>“ One cannot know that which is not – that which is impossible, nor utter it; for it is the same thing that can be thought, that is. ” </li></ul><ul><li>To think of something is to think of an idea (i.e. Uncorn) </li></ul><ul><li>The IDEA of a unicorn is real. </li></ul><ul><li>Therefore unicorns are real in the realm of ideas. </li></ul>
  31. 31. Parmenides <ul><li>To think of something means that “ something ” exists </li></ul><ul><li>It is impossible to think of “something” that does not exists because you would have to think of “something” and “not-something” at the same time. </li></ul><ul><li>Existence includes more than objects in the physical world. </li></ul><ul><li>When you think of “something” you are thinking of an IDEA . </li></ul><ul><li>Ideas are real. </li></ul><ul><li>Reality includes IDEAS . </li></ul>
  32. 32. Parmenides <ul><li>Everything is Eternal </li></ul><ul><ul><li>It is impossible for something to come out of nothing. </li></ul></ul><ul><ul><li>It is also impossible to for something to become nothing. </li></ul></ul><ul><ul><li>Therefore, things are eternal (no beginning and no end). </li></ul></ul>
  33. 33. Parmenides <ul><li>Time does not change </li></ul><ul><ul><li>If you can think of something that will exist in the future, then it exists in your mind in the present. </li></ul></ul><ul><ul><li>If you think of something that existed in the past, then it also exists in your mind in the present. </li></ul></ul><ul><ul><li>Therefore, anything that can be thought of has always existed and always will exist. </li></ul></ul>
  34. 34. Parmenides <ul><li>Change is an Illusion </li></ul><ul><ul><li>If everything that can be thought of is eternal, then the universe is an eternal, single and unchanging entity. </li></ul></ul><ul><ul><li>If the universe is and eternal, unchanging and single entity, then CHANGE is impossible. </li></ul></ul><ul><ul><li>Opposite view of Heraclitus. </li></ul></ul><ul><ul><li>What we perceive as change is just an illusion </li></ul></ul>
  35. 35. Parmenides <ul><li>Perception: </li></ul><ul><li>What kind of woman do you see? </li></ul>
  36. 36. Parmenides <ul><li>Perception: </li></ul><ul><li>Paramenides said that we can't trust our sensory perception (sight, hearing, touch...) because they can be deceived. </li></ul>
  37. 37. Parmenides <ul><li>Logos </li></ul><ul><li>Truth cannot be known though sensory perception. </li></ul><ul><li>Truth can only be know through Logos. </li></ul><ul><li>Logos = Reason </li></ul>
  38. 38. Zeno of Elea <ul><li>Paramenides' Student </li></ul><ul><li>Wrote many paradoxes to prove Paramenides' premise that change is an illusion </li></ul>
  39. 39. Zeno of Elea <ul><li>Paradox of Motion </li></ul><ul><li>Before the runner can pass the finish line he must pass the half-way point. </li></ul><ul><li>Before he can pass the half-way point, he must pass half the distance between the starting point and half-way point. </li></ul><ul><li>Since you can infinitely divide space the runner can never leave the starting point. Therefore, motion is impossible </li></ul>Start Finish 1/2 1/2 1/2 1/2 1/2 1/2
  40. 40. Zeno of Elea <ul><li>Achilles and the Tortoise </li></ul>1/2 In order to reach the point where the Tortoise started Achilles must first pass the half-way point.
  41. 41. Zeno of Elea <ul><li>By the time Achilles reaches the point where the tortoise was the tortoise will have moved on from that point. </li></ul>1/2 Achilles and the Tortoise When the Tortoise moves that will create a new half-way point that Achilles must also cross.
  42. 42. Zeno of Elea <ul><li>Achilles and the Tortoise </li></ul>1/2 Each time Achilles reaches the point where the tortoise was he will have a new half-way point to cross.
  43. 43. Zeno of Elea <ul><li>Achilles and the Tortoise </li></ul>1/2 Since the Tortoise is constantly moving his movement will produce an infinite number to half-way points that Achilles must cross before passing the Tortoise. Therefore, Achilles will never pass the Tortoise.
  44. 44. Zeno of Elea <ul><li>Arrow Paradox </li></ul><ul><li>At any point in time an arrow can only occupy one position and is therefore motionless. </li></ul><ul><li>At every point in time the arrow is motionless. </li></ul><ul><li>If the arrow is motionless at every point in time then it does not move. Movement is an illusion. </li></ul>
  45. 45. Zeno of Elea <ul><li>Zeno's Paradoxes </li></ul><ul><li>Show that a good and logical argument can lead to a false conclusion. </li></ul><ul><li>Therefore, Logic seems to be flawed </li></ul>
  46. 46. Democritus <ul><li>Questions </li></ul><ul><li>What is the basic unit of matter? </li></ul><ul><li>What is the soul? </li></ul><ul><li>Does everything have a cause? </li></ul>
  47. 47. Democritus <ul><li>Atoms </li></ul><ul><li>The cosmos is made up of Atoms and Void </li></ul><ul><li>Atoms = Indivisible particles of matter </li></ul><ul><li>Void = The space between atoms </li></ul>Atoms Void
  48. 48. Democritus <ul><li>Problem of the Void </li></ul><ul><li>A VOID is the absence of something. </li></ul><ul><li>Therefore, a VOID is nothing. </li></ul><ul><li>If a void is nothing then how can it be real? How can a void exist if it is nothing? </li></ul>Atoms Void
  49. 49. Democritus <ul><li>The Soul </li></ul><ul><li>The soul is a material aspect of the body </li></ul><ul><li>Therefore, it cannot be separated from the body. </li></ul>
  50. 50. Democritus <ul><li>Knowledge </li></ul><ul><li>The knowledge of truth is difficult. </li></ul><ul><li>Perception through the senses is subjective. </li></ul><ul><li>We can only interpret the sense data through the intellect and grasp the truth. </li></ul>