ontological argument Flashcards
where does first formulation of anselms argument come from
proslogion 2
a priori argument
relies on logic and reasoning
-empirical evidence not used in argument
what do a priori arguments depend on
-validity of premise which should make conclusions an obvious deduction
anselms definition of god
-that than which nothing greater can be conceived
the fool and anselm
-Psalm- the fool hath says there is no god
-how can you say no god if you know definiton
anselms premise and conclusion of argument
P1. God is the greatest conceivable being (by definition)
P2. It is greater to exist in reality than the mind alone
P3. God exists in the mind
C1. Therefore, God exists in reality
anselms OA justifies belief in god
most people agree with definiton, if god exists he would be greatest concievable being
-a priori and based on logic, senses deceive so better to rely on logic
-following premises, god has to exist because greatest being, valid reasoning to say better in reality than in mind
anselms OA does not justify belief in god arguments
-is it possible to define something into existence we dont know of or isnt physical
-a priori can use invalid logic, a posteriori give evidence empirically for god
-we can argue better to exist in mind alone as we can imagine things that are otherwise impossible
guanilos premise for disagreeing with anselm
-criticises logic of OA
-argues having understanding of something in your mind so it must exist in reality not good logic
Guanilos lost island
-greatest island no ones ever found
-any island in real life greater
-since island greatest island better to exist in reality than mind
-island must exist in reality but doesnt because he made it up SIKEEE
guanilos criticism of anselm
-island doesnt exist in reality
-easier to have understanding of things we can see but cant know for certain god
-difficult to have idea of god even in mind
-just because we understand something in our minds doesnt mean it exists in reality
where is anselms second formulation from
proslogion 3
anselms second formulation NOT AS RESPONSE TO GUANILO
- same as formulation 1
-possible to think of beings that come in and out of existence contingent and necessary
-necessary being greater than contingent being
-since necessary being greater than contingent and god greatest so god must exist
guanilos criticisms are successful arguments
-possible to imagine something in your mind, doesnt have to exist in reality,
-anselm defining something into existence, possible to have definition of something that exists in imagination
-B Russell- existence only meaningful if it refers to instance of something
guanilos criticisms are weak arguments
-platinga supports anselm against guanilo, island has no intrinsic maxim, always be improved, god has intrinsic maxim- greatest so he exists
-how a priori works- if you agree with definition then conclusions folllow
-Guanilo and Russell, need for empirical evidence to prove existence, senses have problems
analytic statement
-statement that contains truth needed to verify it within the statement itself
-true because of its meaning
synthetic statement
-statement that needs external evidence to verify whether it is true or false
kants criticisms are successful arguments
-kant right to argue existence synthetic verification, god exists not analytical, all statements about things existing synthetic and need external proof
-existence not real predicate, doesnt add anything new to description of concept
-definition concept does not bring it into existence, if we can think existence we can think non existence
kants criticism are weakness arguments
-a priori uses reason only not synthetic evidence, mountain has valley, cant be separated
-definition of god includes predicate of existence, existence part of what it means to be greatest being
-god logically necessary, second formulation, greater than contingent and no non existence so must exist
descartes OA more success
-descartes defines god as supremely perfect being, existence predicate because its part of essence of god
-descartes argues existence part of gods essential essence in same way triangle has 3 sides,
-god exists analytic statement, no need for evidence because term good has idea of existence, logically necessary
kants criticisms stronger than descartes OA
kant argues existence not proper predicate because doesnt add something extra to description
-triangle defining thing having 3 sides but possible to reject definition and concept
-god exists as synthetic statement, need evidence of things that exist, OA cant prove existence from reason alone
a priori arguments more persuasive arguments
-rely only on reason and logic so dont need misleading senses
-more persuasive because have premises that have to lead to conclusions, once premise agreed conclusions must agreed, most certainty
-concepts can be defined a priori and dont rely on empirical evidence that has different int.
a posteriori arguments more persuasive arguments
-a posteriori relies on empiricism, everyone can observe them
-start from what is known
-2 explorers see same evidence but have different int. can lead to probable evidence
strength of OA in definition of god
-anselm uses theolgoically and philosophically convincing definition for god
-avoids defining something beyond our understanding
-we cant fully know god but can understand him