Anselm’s Ontological Argument

STARTER TASK:

‘Fools say in their hearts, “There is no God”’

Psalm 14:1Copy this statement down. What do you

think it is trying to suggest and why?

LEARNING OBJECTIVE – I will be able to explain Anselm’s twotwo ontological arguments, and

start to assess Gaunilo’s response.

April 20, 2023

ANSELM’S ONTOLOGICAL ARGUMENT

Write your Outcome down into your notes

Learning OutcomesAll students will be able to explain

ANSELM’S two arguments (grade E & D)

MOST students will be able to assess ANSELM’S argument using Gaunilo’s

critiques. (grade C)

SOME students will be able to evaluate the Ontological argument

using Gaunilo’s and Anselm’s arguments

(grade B & A)

A predicate is…

‘an intrinsic property or quality of something’

Predicates of an elephant might be…

A trunk, size, long ears, being a mammal, tusks, long memory, etc…

Predicates of…?

The Earth

A Car

A Human

Anselm’s essential claim is…

Existence is a predicatepredicate of God (it is a property or quality of God’s nature).

Anselm’s First Argument

1) God is the greatest possible being which can be conceived (thought) of.

2) God may exist either in the mind alone, or in reality as well.

3) 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).

Features of the first argument (for an essay plan).

1) ‘a being which nothing greater can be conceived’: Anselm expects everyone will accept this definition.

2) Painter and painting analogy (mind and reality).3) Reductio ad absurdum – if he does exist in the

mind alone then he is not greatest possible being.4) God’s existence is analytic (once we analyse the

definition of the term we will see that God exists).5) Anyone who doesn’t accept it is a ‘fool’, as it is

plain and obvious.

Anselm’s second argument

1) God is that being nothing greater than which can be thought of.

2) 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.

Argument 2: In simpler language…

1) You can’t think of anything greater than God.

2) Necessary things are greater than contingent things.

Conclusion

3) God is necessary

Features of Anselm’s second argumentFeatures of Anselm’s second argument

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.

Gaunilo’s response Gaunilo was a 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?

2) You can’t define things into existence3) The Perfect Island

The Perfect Island

Think of some other examples you could include to demonstrate the point about the Perfect Island in an essay…

PlantingaPlantinga – Islands are 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.

Homework

Use the info in this Powerpoint and the last to write an essay plan for ‘Explain ‘Explain Anselm’s ontological arguments…’ Anselm’s ontological arguments…’ (25 marks).

Pick three main points and write out three paragraphs.

For next lesson

ANSELM’S ONTOLOGICAL ARGUMENT

Write your Outcome down into your notes

Learning OutcomesAll students will be able to explain

ANSELM’S two arguments (grade E & D)

MOST students will be able to assess ANSELM’S argument using Gaunilo’s

critiques. (grade C)

SOME students will be able to evaluate the Ontological argument

using Gaunilo’s and Anselm’s arguments

(grade B & A)