Anselm's ontological argument claims that God must exist because God is defined as the greatest being that can be conceived. His first argument is that existence in reality is greater than just existing in the mind, so if God is the greatest being, God must exist in reality. His second argument is that a necessary being (one that cannot not exist) is greater than a contingent being, so God as the greatest being must be necessary and therefore must exist. Gaunilo criticized this argument using the example of a perfect island, saying you cannot define something into existence just because it is a perfect conception.
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Introduces Anselm’s ontological arguments and Gaunilo’s critique, referencing Psalm 14:1.
Defines predicates as intrinsic qualities, with examples like elephants, Earth, cars, and humans.
Establishes existence as a predicate of God; argues God must exist in reality to be the greatest being.
Outlines features of Anselm's first argument, including definitions, analogies, and the ‘fool’ concept.
Presents Anselm’s second argument that God's existence is necessary and greater beings cannot be imagined not to exist.
Discusses necessary existence in Anselm’s second argument, aimed at rational justification of belief in God.
Introduces Gaunilo’s response to Anselm's argument, including the perfect island analogy to challenge it.
Encourages thinking of additional examples related to Gaunilo's critique of the perfect island concept.
Compares islands to God, stating that islands can always be more perfect, making the concept incoherent.
Instructs students to create an essay plan on Anselm's arguments, focusing on key points.
Anselm’s Ontological
Argument
L/O –I will be able to explain Anselm’s two
ontological arguments, and start to assess
Gaunilo’s response.
‘Fools say in their hearts, “There is no God”’
Psalm 14:1
Copy this statement down. What do you think it is trying to suggest and
why?
2.
A predicate is…
‘anintrinsic property or quality of something’
Predicates of an elephant might be…
A trunk, size, long ears, being a mammal,
tusks, long memory, etc…
Anselm’s essential claimis…
Existence is a predicate of God (it is a
property or quality of God’s nature).
5.
Anselm’s First Argument
1)
2)
3)
Godis the greatest possible being which can be
conceived (thought) of.
God may exist either in the mind alone, or in reality
as well.
Something which exists in reality and in the mind
is greater than something which exists just as an
idea in the mind alone.
Conclusion:
4) God must exist in reality and in the mind (or we have
not thought of the greatest possible being).
6.
Features of thefirst argument
(for an essay plan).
1)
2)
3)
4)
5)
‘a being which nothing greater can be conceived’:
Anselm expects everyone will accept this
definition.
Painter and painting analogy (mind and reality).
Reductio ad absurdum – if he does exist in the
mind alone then he is not greatest possible being.
God’s existence is analytic (once we analyse the
definition of the term we will see that God exists).
Anyone who doesn’t accept it is a ‘fool’, as it is
plain and obvious.
7.
Anselm’s second argument
1)
2)
Godis that being nothing greater than
which can be thought of.
Something which cannot be thought not to
exist is greater than anything which can be
thought not to exist.
Conclusion:
3) Therefore, it is impossible to think that this
being (God) cannot exist.
8.
Argument 2: Insimpler
language…
You can’t think of anything greater
than God.
2) Necessary things are greater than
contingent things.
Conclusion
1)
3) God is necessary
9.
Features of Anselm’s
secondargument
1) This adds the idea that it is impossible
for God not to exist – in other words,
God is necessary.
2) It has been argued that his second
argument was aimed at believers as a
proof that existence in God is rational
– to justify a belief in God.
10.
Gaunilo’s response
Gaunilo wasa contemporary of Anselm, he was a
monk who rejected Anselm’s argument in ‘On
Behalf of the fool’ using three arguments….
1)
On Gossip – the fool could have all kinds of made
up things in his head, gossip for instance is
unreliable – how should he be able to discern what
is true and what is not?
You can’t define things into existence
The Perfect Island
2)
3)
Think of someother examples you
could include to demonstrate the point
about the Perfect Island in an essay…
13.
Plantinga – Islandsare different to
God – there could always be a more
perfect Island - more dancing girls,
more lush palm trees, twice the size,
etc. – idea of a greatest possible
island is incoherent. God on the other
hand is maximally great – nothing
greater is possible.
14.
Homework
Use the infoin this Powerpoint and the
last (they’re on moodle) to write an
essay plan for ‘Explain Anselm’s
ontological arguments…’ (25 marks).
Pick three main points and write out
three paragraphs.
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