Areas
- Logic (deductive, inductive)
- Epistemology (perception, mind)
- Perception
- Fundamentalism: beliefs are based on a handful of self evident fundamental beliefs
- Empiricism: we are born as blank slates and know the world through our experiences
- Idealism: only minds and ideas exist vs Materialism: reality is physical
- Mind
- Dualism: a person is made of a physical part that can die, and a nonphysical part that can never die
- Parallelism: no interactions between physical and no physical worlds. They only appear to interact, like two separate clocks
- Epiphenomenalism: thing are only happening in physical realm
- Monism: only one substance, neither mental nor physical but contains properties of each
- Functionalism: only cares about the result, not what happens behind the scene. This is compatible with dualism.
- Money â vending machine â drink
- Sensation â mental state â behavior
- Metaphysics (nature of reality, free will, god)
- Free will
- Determinism: all events are determined by past states and law of physics
- Compatibilism: free will is compatible with determinism
- Indeterminism: at least one event is not determined by the past and laws of physics
- Incompatibilism: free will and determinism are not compatible
- Agency theory: examines causal relationship, freedom means in control without a causal precedent that inevitably leads to this action. Eg if x inevitably causes y, if I have control over x then itâs free choice. But if I have no control over x, then I have no free choice on y
- God
- Axiology (ethic, beauty)
- Universality condition: ethics applies to everyone equally regardless of gender, creed, or lot in life
- Objective morality: acts are inherently right or wrong, independently of god
- Role of social contract: humans are intrinsically selfish. Only a competing self interest like fear of punishment can deter it
- Deontology/Absolutism: wrong acts (like lying) are alway wrong (regardless of consequence) vs Consequentialism: an act is right or wrong based on its consequences, not the type of act
Philosophers
- Ancient (700BCE - 500CE)
- Pre-Socratic
- Thales (625BCE - 547BCE)
- Answer questions with natural observations
- Life is composed of water because water exists in solid, liquid and gas phases
- Heraclitus (540BCE - 480BCE)
- Emphasis on change and impermanence
- âThe sun is new every dayâ. âItâs not possible to step twice into the same riverâ.
- Democritus (460BCE - 370BCE)
- Atom theory of universe
- Everything is deterministic. If we have enough computing power we can predict future
- Determinism: all events are determined by past states and law of physics
- Incompatibilism: free will and determinism are not compatible
- Deterministic â no free will
- Socrates 469-339bce Greece
- âThe unexamined life is not worth livingâ
- Never wrote any philosophy, known chiefly through the accounts of Plato and Xenophon
- The Socratic method: one gets to the heart of a matter through a steady stream of pointed questions
- Believed that he himself had no wisdom. Also questioned Athenâs elites which cost his life
- Accepts universality condition from Euthyphro
- Universality condition: ethics applies to everyone equally regardless of gender, creed, or lot in life
- Debates about whether god defines righteousness
- Objective morality: acts are inherently right or wrong, independently of god
- If one had known the good, he would have done the good
- Plato 428-347bce Greece
- âUntil philosophers are kings, cities will have no rest from their evilsâ - Republic, 360bce
- Founded The Academy in 386bce
- Plato is a nickname meaning broad. Given name is Aristocle
- Dualism: a person is made of a physical part that can die, and a nonphysical part that can never die
- Fits perfectly with Christianityâs body and soul
- we are born with innate ideas given by god
- Aristotle 384-322bce Greece
- Deductive logic: conclusions are conclusive when premises are true (vs Inductive logic: premises donât support conclusion only to some degree)
- Truth generating: gives new claims from existing ones
- Truth preserving: if you start with truth, you end up with truth, no matter how many steps
- This is how math knowledge is extended
- Catholicâs favorite philosopher
- On virtue: humans are born with few desires and develop opinions as we grow. Need parents to guide so that they want to take the virtuous paths
- Medieval 500-1599
- Thomas Aquinas 1225-1274 Italy
- Summa theologica, 1264-1274
- Italian Dominican friar and priest
- First cause argument: everything is caused by a preceding event, except a âfirst causeâ, which is outside the chain of events
- God is uncaused being
- One premise: the chain of events cannot be infinite
- Aristotleâs argument against infinity: if I have infinite marbles and give away half, I still have infinite, which doesnât make sense
- also backed by Kant: All temporal expanses are finite (future is finite, past is finite)
- Early modern 1600-1800
- Thomas Hobbes 1588-1679 UK
- âLife in the state of nature is solitary, poor, nasty, brutish, and shortâ - from Leviathan, 1651
- Role of social contract: humans are intrinsically selfish. Only a competing self interest like fear of punishment can deter it
- Different from Socrates: If one had known the good, he would have done the good
- Rene Descartes 1596-1650 France
- âCogito, ergo sumâ
- Wrote Meditations on first philosophy 1641
- Invented Cartesian coordinate system
- One of the big 3 rationalists
- Fundamentalism: beliefs are based on a handful of self evident fundamental beliefs
- All senses can be doubted, a fundamental truth must be verifiable independent of sensory experiences
- I exist. (If I doubt that, the existence of a doubter is implied)
- Agrees with Plato on: Dualism: a person is made of a physical part that can die, and a nonphysical part that can never die and
- we are born with innate ideas given by god
- Cartesian interaction: Mind=pilot, body=ship.
- Criticisms of Cartesian interaction: defies conservation of energy (because mind is nonphysical); brain research shows the mind is deeply rooted in physical brain
- John Locke 1632-1704 UK
- âNo manâs knowledge here can go beyond his experienceâ
- An essay concerning human understanding, 1689
- Separation of church and state, theory of private property
- Empiricism: we are born as blank slates and know the world through our experiences
- Vs descarte and Plato who think we are born with innate ideas given by god
- Agrees with Descartes on senses are subjective and can be doubted. Color is a sensory idea. Wavelength of light is a primary quality that is objective
- Baruch Spinoza 1632-1677 Netherlands
- âWe feel and experience ourselves to be eternalâ - Ethics, demonstrated in geometrical order, 1665
- Pantheistic, excommunicated by Jewish community, worked as lens grinder and died from glass dust damage in lungs
- One of the big 3 rationalists
- Rejects Platoâs dualism
- Monism: only one substance, neither mental nor physical but contains properties of each
- Physicalism: a form of Monism, mind is also physical, no afterlife
- Identity theory: all mental processes are merely brain states
- Neurobiologist Roger Sperry discovers that the right and left brains work independently
- Gottfried Leibniz 1646-1716 Germany
- âNothing can be taught us of which we have not already in our minds the ideaâ - Discourse on metaphysics 1686
- One of the big 3 rationalists
- Agree with Plato and Descartes that mind and body are separate. But not the Mind body interaction aka Cartesian interaction: Mind=pilot, body=ship.
- Parallelism: no interactions between physical and no physical worlds. They only appear to interact, like two separate clocks
- Resorted to âgod did itâ on how the two worlds are synchronized
- George Berkely 1685-1753 UK
- Idealism: only minds and ideas exist
- Opposite of idealism:
- Materialism: reality is physical
- Also believed that god is the source of ideas
- Julien la Mettrie
- humans are biological machines
- David Hume 1711-1776 UK
- Compatibilism: free will is compatible with determinism
- Free will caused by desire
- Desired caused by past states and laws of physics
- Definition of freedom: if I had different desires, then I could have done otherwise
- Criticisms:
- In the case of hypnotizing, whoâs really in control of the choice?
- quantum physics: subatomic particlesâ actions are not determined by past states and laws of physics
- Against the design argument on god and the pocket watch analogy
- natural objects are also imperfect and the imperfection causes suffering. Problem of the evil: you canât have a perfect deity and all this bad stuff
- And pocket watch is a product of trial and error over a long period of time
- Also, if complexity of earth is 1, the creator must have a complexity of 2, then it must be designed by a creator of complexity 3, and so on
- Immanuel Kant 1724-1804 Germany
- âTwo things fill the mind with ever new and increasing admiration and awe, the oftener and the more steadily we reflect on them: the starry heavens above and the moral laws withinâ - critique of practical reason 1781
- Punctual walker. Claimed that reading Hume enlightened him from âdogmatic slumberâ
- All temporal expanses are finite (future is finite, past is finite)
- Contradicted by modern math
- Deontology/Absolutism: wrong acts (like lying) are alway wrong (regardless of consequence)
- An act is right only if it is motivated by duty instead of desire
- Opposite: Consequentialism: an act is right or wrong based on its consequences, not the type of act
- William Paley 1743-1805 UK
- Wrote Natural theology 1802
- The design argument with the watchmaker analogy: if you stumble on a rock, no big ideal. But if you stumble on a pocket watch, it must be designed by someone
- Consider things like an eye, itâs natural but itâs very intricate. There must be a designer involved
- Our planet is suited for living, even laws of physics are tuned to allow our survival. There must be a powerful being designing this
- Criticisms from David Hume: Against the design argument on god and the pocket watch analogy and from Darwin: Animals and plants adapt to the environment, instead of having some designer to design the environment to fit them.
- Jeremy Bentham 1748-1832 UK
- âThe question is not âcan they reasonâ not âcan they talkâ but âcan they sufferââ - the principles of morals and legislation, 1789
- Founder of modern utilitarianism
- Consequentialism: an act is right or wrong based on its consequences, not the type of act
- Calculate the moral requirements for each person to perform the action:
- Intensity: how strong the pleasure or pain is felt
- Fecundity: chances of follow up pleasure or pain
- Duration of pleasure or pain
- Purity: chance that pleasure will be followed by pain or pain will be followed by pleasure
- Certainty
- Propinquity: how close the pleasure or pain is to the act
- Extent: number of people affected
- alternatively: Just ask people involved, or votes (but weighted, ie human weighs more than pigs)
- Criticisms: calculation of outcome is prone to error; might encourage people to justify bad actions in some cases
- Related: đ What we owe the future
- 1800s
- John Stuart Mill 1806-1873 UK
- Wrote Utilitarianism 1863
- Inductive reasoning: generalize from past events to predict future
- Generates laws, but not truth
- based on best evidence available, but recognize that we could be wrong (fallibilism)
- Agrees with Consequentialism: an act is right or wrong based on its consequences, not the type of act but has a easier system for figuring out if end has justified the means:
- Just ask people involved, or votes (but weighted, ie human weighs more than pigs)
- Charles Darwin 1809 - 1882 UK
- âIgnorance more frequently begets confidence than does knowledge: it is those who know little, not those who know much, who so positively assert that this or that problem will never be solved by scienceâ
- Wrote On the origin of species by means of natural selection 1859
- Animals and plants adapt to the environment, instead of having some designer to design the environment to fit them.
- When environments change, creatures die, move, or adapt
- Human eye developed and changed over millions of years of evolution
- Thomas Huxley 1825-1895 UK
- Epiphenomenalism: thing are only happening in physical realm
- No control over life
- Mind is just a meaningless byproduct of physical world
- Friedrich Nietsche 1844-1900 Germany
- âIf you gaze long enough into the abyss, the abyss will gaze back into youâ - beyond good and evil, 1866
- Youngest professor up to his time (at 24)
- Mad that his sister changed his work to be nazi friendly
- Morality is anti-life because humankind doesnât need to be improved in the first place
- We shouldnât deny basic humanity, our instincts and desires
- Especially against tradition Judeo-Christian moralities
- Advocates for revaluation of values: new values based on self-affirmation, strength, and creativity
- 1900s
- Alan Turing 1921-1954 UK
- âA man provided with paper, pencil, and rubber, and subject to strict discipline, is in effect a universal machineâ - intelligence machine, 1969
- If a computer passes the Turing test, it should be considered a human
- Aligns with Julien Offray de La Mettrie: humans are biological machines
- David Chalmers 1966- Australia
- âI argue that neuroscience alone isnât enough to explain consciousness, but I think it will be a major part of an eventual theoryâ
- âThe conscious mindâ, 1996
- Turing test passing computers are have no consciousness and are mindless, even if they are functionally identical to brains
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