Lecture 3 Predecessors of psychology: 17th/18th century developments - 1600-1700 Flashcards
hoe heet de methode van descartes
cartesian doubt
wat houdt cartesian doubt in
i doubt is always true!! het enige wat we zeker weten, zegt namelijk niks over wat we denken of wat we observeren.
descartes ging dus gewoon alles wat hij wist af, en het kwam er op neer dat letterlijk NIKS zeker is, je kan voor alles wel een argument van doubt bedenken. het enige wat zeker is is dat we twijfelen (i doubt is always true)
i think therefore i am = vertaling…
cogito ergo sum
wat was zijn gedachte over mind-body
dualism: The soul will always doubt, but you can imagine the soul without the body! Even if the body would not exist, the soul would not cease to be what it is -> mind and body are distinct.
wat dachten plato en aristotle over mind-body
plato: dualism
aristotle: monism (the soul and the body are in fact linked to form one entity, whereby one simply cannot exist without the other.)
“In my college days I
discovered that
nothing can be
imagined which is too
strange or incredible to
have been said by some philosopher”
“Nothing solid could
have been built upon
such shaky
foundations”
descartes
“For a long time I had remarked that it is sometimes requisite in common life to follow opinions which one knows to be most uncertain, exactly as though they were indisputable, as has been said above. But because in this case I wished to give myself entirely to the search after truth, I thought that it was necessary for me to take an apparently opposite course, and to reject as absolutely
false everything as to which I could imagine the least ground of doubt, in order to see if afterwards there remained anything in my belief that was entirely certain.
descartes
But immediately afterwards I noticed that whilst I thus wished to think all things false, it was absolutely essential that the ‘ I ‘ who thought this should be somewhat, and remarking that this truth “I think therefore I am” was so certain and so assured that all the most extravagant suppositions brought forward by the sceptics were incapable of shaking it, I came to the conclusion that I
could receive it without scruple as the first principle of the Philosophy for which I was seeking.”
oke
hoe kwam descartes bij het dualism
hij kon zich wel voorstellen dat hij geen lichaam had, maar hij kon zich niet voorstellen dat hij geen ziel had. daarom: moeten de ziel en het lichaam wel twee aparte dingen van elkaar zijn.
And then, examining attentively that which I was, I saw that I could conceive that I had no body, and that there was no world nor place where I might be; but yet that I could not for all that conceive that I was not. On the contrary, I saw from the very fact that I thought of doubting the truth of other things, it very evidently and certainly followed that I was; […] From that I knew that I was a substance the whole essence or nature of which is to think, and that for its existence there is no need of any place, nor does it depend on any material thing; so that this ‘ me,’ that is to say, the soul by which I am what I am, is entirely distinct from body, and is even more easy to know than is the latter; and even if body were not, the soul would not cease to be what it is.
oke
dus hoe ging de gedachtegang van descartes
– I doubt
– So there is something that is doubting
– I call that something “the mind”
– I cannot doubt the existence of this mind
– The mind is not material. After all, you can doubt anything that is material
– The mind thus must exist separately from the body: Dualism
hoe kwam descartes bij het bestaan van God
- i doubt
- therefore, i am not perfect
- where do i get the idea of perfection then?
- i can think of less perfect things, but not of more perfect things
- the idea of perfection must have been placed inside me by something more perfect than me
- whoever placed that idea of perfection in me must have all the perfection that i can think of
- that is God
- since God is not perceived, the idea of God must be innate
dus wat was descartes: rationalist of empiricist
rationalist
Because God is perfect, God will not fool us: the world we perceive outside of us, exists!
oke
the mind-body problem =
Descartes believes he has proven that the mind is a separate substance. The body, however, he sees as a machine. The mind controls the body; thus body and mind must
interact. But how does the mind receive information from perception, and how does the mind influence the body?
hoe kijken we nu naar het dualism
- According to later developed physics, Descartes’ dualism can not be right
- A mind that controls the brain must set something in motion but the mind itself is immaterial and does not fall under the laws of physics
- That would mean that the (Cartesian) mind adds energy out of nothing: This violates the Law of Conservation of Energy
- Moreover, it is now clear that all kinds of traditional “mental” properties can be influenced by e.g. neurosurgery
wie gaf kritiek op descartes
Elisabeth of Bohemia
“Given that the soul of a human
being is only a thinking substance,
how can it affect the bodily spirits, in
order to bring about voluntary
actions?”
* “I have to say that I would find it
easier to concede matter and
extension of the soul than to concede
that an immaterial thing could move
and be moved by a body…”
elizabeth of bohemia
wat is zo raar aan deze redenatie van descartes
Descartes is actually in all aspects a
materialistic and mechanistic
thinker, except for the “soul” -> inconsistent reasoning.
But, beware of hindsight bias:
Descartes coundn’t foresee how
physics and neuroscience would
proceed…
oke
Descartes’ substance-dualism
(in which the mind is an
immaterial yet causally
effective substance) has been
widely rejected
-> However, there is no
agreement on the alternative
oke
Rejecting dualism easily leads to materialism, but…..
does NOT need to imply reductionism!!!!!!!!1
reductionism =
the view that theories of mental properties can be reduced to neuroscientific theories.
materialism=
nothing exists except matter, its movements and its modifications
waarom is descartes een rationalist
Descartes, like Plato, views reason rather
than experience as the primary source of
secure knowledge
wat gebeurde er na descartes
juist weer een interesse in empiricism, door de british empiricists.
wie waren de british empiricists
John Locke
(1632-1704)
George Berkeley
(1685-1753)
David Hume
(1711-1776)
locke argumenten voor empiricism
- “If we will attentively consider
newborn children, we shall
have little reason to think that
they bring many ideas into the
world with them” - we dont find universal principles in children
- principles can differ per culture
“Let us then suppose the mind to be, as we
say, white paper void of all characters,
without any ideas. How comes it to be
furnished? Whence comes it by that vast
store which the busy and boundless fancy
of man has painted on it with an almost
endless variety? Whence has it all the
materials of reason and knowledge? To this
I answer, in one word, from experience”
locke
wie had dus tabula rasa bedacht
aristotle bedacht, locke weer populair gemaakt en herhaald
wat voor invloed had de herhaling van de tabula rasa
als alle mensen zouden starten als tabula rasa, dan zou iedereen dus hetzelfde zijn: natural rights.
= political implication
op wie reageerde locke
op descartes
op wie lijkt locke
aristotle
op wie lijkt descartes
plato
dus wat switcht steeds tussen rationalisme en empiricisme…
epistemology
epistemology=
how do we know what is true?
Berkeley takes Locke’s idea
very seriously
oke