Objections based on Existence as a
Predicate of God and responses
INTRO
The ontological argument, which uses a priori logic,
states that God being defined as most great or perfect,
must exist, since a God who exists is greater than a God
who does not. St. Anselm proposed the first version which
was later looked at by Rene Descartes who developed his
own form. Both arguments rely upon existence as a
predicate. They claim that the predicate 'exists' cannot be
separated from the idea of God in the same way that the
predicate 'has 3 angles' cannot be separated from the
subject 'triangle'. It would be contradictory to claim a
triangle does not have 3 sides in the same way it would be
contradictory to say 'God does not exist.'
KANT
In addition, Kant argued that existence is not a real predicate, as it does
not add anything to our understanding of a thing. For example, the
concept of 100 real silver coins does not contain a coin more than the
concept of 100 possible silver coins. Kant claimed that a predicate must
give us information about something, it is a quality that something either
has or lacks. He proves this by reversing Anselm's statement, if 'X' exists,
then X possess' the quality of existence. 'X does not exist' tells us that X
does not possess this quality. But a thing that does not exist cannot lack
anything. Therefore when people claim God exists they are saying there is
a God and he possess the quality of existence, then when people say God
does not exist, he lacks the quality of existence which would affirm and
deny his existence in one breath.
Kant argued that there is no contradiction in
dismissing both the subject and it's predicate,
i.e. dismiss the idea of the 3 angles and the
triangle. It is therefore possible to dismiss God
and his existence.
RUSSELL
Bertrand Russell, an atheist, also claimed existence is not a
predicate and believed Anselm and Descartes used the word
'exists' incorrectly. He uses the syllogism that men exist, Santa
Claus is a man, therefore Santa exists. Santa is a fictional male
character and belongs to another category to the man in the first
predicate - therefore it is inaccurate to make the jump. He claimed
existence is not a property of things, but of the idea of things, he
uses the analogy of a cow. The statement 'a cow is quadrupped
with udders' - the intention is to describe a cow but the fact the
cow exists provides an extension to the description but is not part
of it. Existence is an extension of an intention, when we conceive
a cow we can accept its existence but we can't say that for God.
RESPONSE: DAVIS
Stephen Davis pointed out that Kant was not able to
prove conclusively that 'exists' is not a real predicate.
He argues that his concept of the Loch Ness Monster
would change if someone were to convince him that the
creature exists. Also his idea of a hundred silver coins
includes them having purchasing power in the real
world. His concept of imaginary coins does not have
that property. Therefore things that exist in reality are
greater than they would be if they just existed in the
mind. So Kant's criticism does not refute the OA
RESPONSE: DESCARTES
Descartes argues that God must possess existence to be perfect,
therefore existence must be a predicate of God. It is also illogical,
thinking of God without the predicate of existence is like thinking of a
triangle without 3 sides.