Kant critique of ontological argument

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dont know it
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What premise of the ontological argument does "existence is not a predicate" actually disprove?
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Joe312
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For Descartes' ontological argument, Kant disproves the premise that 'Existence is a perfection which a supremely perfect being contains'

For Anselm's ontological argument, Kant disproves the premise that it is greater to exist in reality than in the mind alone.
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(Original post by Joe312)
For Descartes' ontological argument, Kant disproves the premise that 'Existence is a perfection which a supremely perfect being contains'

For Anselm's ontological argument, Kant disproves the premise that it is greater to exist in reality than in the mind alone.
Thanks.

Could you help me with another question too please?

Anselm said his argument only applies for necessary beings in response to Guanilo's island. How does this help his argument against the criticism? Is it because an island doesn't need to exist in the mind nor reality?

Why does it only applying to necessary beings prove Guanilo wrong??
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gjd800
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(Original post by dont know it)
Thanks.

Could you help me with another question too please?

Anselm said his argument only applies for necessary beings in response to Guanilo's island. How does this help his argument against the criticism? Is it because an island doesn't need to exist in the mind nor reality?

Why does it only applying to necessary beings prove Guanilo wrong??
Yes - an island is not a necessary entity, it is a contingent one. God is necessary and so cannot fail to exist.

A necessary being might be defined as something that is (1) eternal and ontologically independent (does not depend on anything else for its existence) and (2) something that is required to exist by the laws of logic.

Gaunilo's error is then a fallacy of composition, because he is comparing a necessary entity to a contingent one. The upshot of this is that a contingent entity does not need to exist. An island always depends on something else for its existence (think of its composition - landmass, water, etc.).

Plantinga eventually added a caveat that an island does not have properties that can be maximally great - you can always +1 to an island's great-making properties (more dancing girls, more fruit), whereas God's great-making properties admit of maximal amounts, all-knowing, all-powerful and so on.
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ibte10
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#5
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(Original post by dont know it)
Thanks.

Could you help me with another question too please?

Anselm said his argument only applies for necessary beings in response to Guanilo's island. How does this help his argument against the criticism? Is it because an island doesn't need to exist in the mind nor reality?

Why does it only applying to necessary beings prove Guanilo wrong??
An Island is contingent- it always relies on something like tectonic plates. But God is a necessary being as he does not need anything to help him function. You cannot think of anything more perfect than a perfect being as he does not need anything like the island did.
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username402722
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#6
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I remember Kant from the Monty Python song! Not as sloshed as Hegel!
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