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medieval view of the world
geometric, hierarchical, humans are species not fully natural, religious, relics on authorityand church
modern science view on the world
sees nature as describable by math, scientific revolution/ enlightenment
applying reason to naturan questioning authorities
Decartes says the human body can be
studied by science
Decartes opens the first meditation by announcing
that he has set aside all distractions so he can seriously question everything he has ever believed and figure out what he can know with absolute certainty.
Demolishes his opinions by
treating traits that are dpubtful as false in order to see if he knows anything with certainty
to see if he can attain certainty he adopts
methodological skepticism
methodological skepticism
uses systematic doubt not to stay doubtful, but to find absolute certainty
Decartes doubts his beliefs by
grouping his beleifs into classes defined by their sources
Beliefs derived from his scences
it is possible that all of our sensory beleifs (sight, hearing, touch, smell, and taste) could be false
could be a dream produced by God, nature, or a demon
decartes doesnt know with certainty that
our world isnt a dream
mathmatical beliefs
beliefs we might think can be certain even if our experience of the world is a dream or illusion
decartes says it is possible that mathmatical beliefs are false bc
God, nature, or a malicious demon could have brought it about that they only seem true when they are not
at the end of the first meditation, Decartes admits he knows
nothin. with certainty
his habitual opinions keep coming back so he imagines that a
demon is deceiving him
epistomolgy
what is knowledge
what doewe know
metaphysics
what is real
in the first mediation decartes is
trying to prove the existence of God and the immortality of life (what he says he is trying to do)
introduction to new science (what he is doing
two types of knowledge
aposteriori and apriori
aposteriori
knowledge from experience
empirical investigation
apriori
prior to/ independent of experience
purely conceptional inquiry
necessary truths that we know with certainty
basic perceptual beleifs are
reliable
for everything that exists
there is a cause
cannot doubt
his own experience as a human being
main idea of the first meditation
Descartes questions all his beliefs by doubting the reliability of his senses, the possibility that he is dreaming, and even mathematical truths to find a foundation for certain knowledge.
what is doubted=
what is certain
canot doubt everthing bc
in order to doubt you must make assumptions
doubting cant happen without a
doubter
cogito ergo sum
i think, therefore I am
he cannot be deceived about
his own existence as a thinking thing
if deception is happening,
then there must be a subject of that deception
decartes assumes that you can imagine being deceived about math and the world, but that you cannot
imagine being deceived about your existance as a thinking subject
ontology
ones idea of what things exist in the world
thinks he is
a purely mental entity that is essential composed of though and other mental operations
cortesian dualism
minds→ non-physical; not scientifically explained
bodies → physical
human beings are a combination of two things
an inmaterial mind joined to a material body
the mind is a
distinct, existing, non-material thing that cannot be identified with any part of the body
decartes thinks we have
direct and unmediate access to the contents of our own minds
implicit bias
subconcious associations that you develop from your social environment
empiricism
the idea that all of our knowledge originates in our senses
believe the mind is a blank slate when born
decartes does not believe this
the wax example
wax is an enduring substance→ using the concept to understand that even though the physical properties of the wax is changing, it is still wax
mind corrects and interprets
your senesation
mediated by thoughts and concepts
innate ideas
object permanance
main idea of the second meditation i
Descartes discovers he can be certain he exists because he is thinking, and he argues that the mind is better known than the body or the physical world.
decartes thinks god is
infinite, eternal, omniscient, and omnipotent being
thinks the idea of god is innate (naturally present in the mind)
the idea of god must be
produced by God himself bc nothing finite, non-eternal, non-omniscnent, and non-omnipotent coluld have produced a perfect God
so god exisits
god must be
keeping him in existence
since god is perfect,
he cannot be a deceiver
there is no purely human explanation for
the idea of god meaning god gave us the idea of god
Descartes believes that if you understand something so clearly that you have no confusion about it, and you can distinguish it from everything else, then
you can know it is true
clear
idea is present in your mind
distinct
idea is precise and separated from other ideas, without confusion.
clear and distinct perceptions
things we know with absolute certainty
the natural light
the faculty through which we have clear and distinct perceptions
if we grasp something through the natural light,
we know that thing with certainty
formal reality
if something has a property formally, then it really has that property
something that formally has a property can convey that property to something that it acts upon
eminent reality
something has some property eminently not when it possesses that property itself but when it possesses the power to cause something else to possess that property
objective reality
property that is possessed only by ideas
content of our idea, what they represent
degrees of objective reality
rank ideas according to the reality of what they represent
Infinite substance — God, who is infinite, eternal, independent, all-knowing, and all-powerful. God has the highest degree of reality.
Finite substances — Things that exist independently of other finite things. They have less reality than an infinite substance.
Modes or properties — Characteristics of substances. They depend on substances to exist, so they have less reality than substances.
the principle of casual adequacy
the cause of something must have at least as much reality as the effect it produces.
argument of the third meditation
our ideas must have causes that are adequate to acocunt for their existance and properties
our ideas are differentied by possessing different contents or objective reality (finite substances, infinite substance)
i could be the cause of all of my ideas of finite substance, but i could not be the cause of my idea of god
idea of god actually exists outside my own mine
god actually posses properties that characterize the idea of god in my mind
god does exist
main idea of the third meditation
Descartes uses the Principle of Causal Adequacy and his idea of an infinitely perfect being to argue that God exists and is not a deceiver.
whatever must be assumed or taken for granted in order to articulate a skeptical scenario cannot
be called into qquestion by that scenario
skeptic aruges that
Everything we perceive or believe, including mathematical truths, could be an illusion created by a deceiver. Since we cannot prove this scenario is false because any evidence could also be part of the illusion, we should suspend belief in our everyday assumptions about reality.
we have no entitlement to think that
any of our beliefs are true
the skeptic has to employ
reason and logic in creating their skeptical scenario
the law of causation is also presupposed in
articulating skeptical scenarios
the law of causation
for every event their is a cause
the activity of doubting presupposes that
many things remain true and these things can perhaps be used to refute skepticism
human evil
the bad acts humans commit against eachother
natural evil
harms to humans and other animals that are the products of nature
what is true about these statements:
1. god is omnipotent (all-powerful)
God is wholly good
Evil exists
1 and 2 cannot both by true if 3 is true
3 has to be false for 1 and 2 to be true
this is the logical problem of evil
the logical problem of evil
if god made is and he is perfect, why are we not perfect and why does evil exist\
why does god allow there to be desease, wars, and suffering
intellectual problem of evil
why God didnt make us perfect knowers, when it seems that is was within his power to do so
perfect knowers
beings who never made intellectual mistakes
response to the problem of evil
theodicy
freewill theodicy
God gave us freewill and we chose to use it for evil
people will abuse freewill (Adam and Eve)
freewill makes it possible for you to choose the good
necessary for a genuine relationship with God
judgement invole the use of two metal faculties
faculty of knowledge
faculty of choice
the two facullties give us
not just cause to fault our creator
the faculty of knowledge
faculty of gathering, assessing, and reasoning about avidence
finite and linited
the faculty of choice
faculty for free will
through which we decide to affirm or deny that something is true
absolutely perfect
God has given us clear guidance about how
we should utilize our faculties of knowledge and choice
we should affirm as true only things that
we can see to be true with sufficient clarity and distinctiness
source of error and sing (cognitive sin)
when we confirm or. deny something when we dont have enough info to do so
our cognitive errors are the result of
the abuse of our freedom
god made us
free knowers who have what they need to choose rightly, but we keep screwing it up
imperfections of humans conrtibute to
a broader perfection
primary qualities
quantifiable properties
secondary qualities
sensations produced in us
The ontological argument
a deductive philosophical proof for the existence of God that relies purely on a priori reasoning and conceptual analysis rather than empirical observation or physical evidence
st anselm
explaining where it goes wrong is harder than it might seem
he notices that many of our ideas have an
instrinsic nature and that have have a certain knowledge about them iven if those ideas do no correspond to anyhting outside the mind
the idea of god is the idea of a
supremely perfect being
has all of the perfections a being can have
our knowledge of gods existence has the same level of certainty
as our knowledge of the properties we derive from the idea of triangles
the mind and matter are
distinct, completely different substances
cartesian dualism
if we genuinely do have bodies,
then we are combinations of mind and matter, a union of two different substances
our mind might survive
the death or destruction of our bodies
now since god is not a deceiver,
it must be true that there are objects outside of our minds that cause us to have sensations and ideas of them
says physical bodies
exist but not in a way the corresponds with his sensory grasp of them
material things only really have
quantifiable properties
corpeal things appear to have qualities
beyond those that are quantiifiable
products of interaction between the real properties o things and the human sensory apparatus
three types of things exist
matter, minds, and God