Maverick Philosopher

Nihil philosophicum a me alienum puto

To promote independent thought about ultimates. Philosophy, commentary on the passing scene, and whatever else turns my crank. Since 4 May 2004. By William F. Vallicella, Ph.D., Gold Canyon, Arizona, USA. Motto: "Study everything, join nothing." (Paul Brunton) Latin Motto: Omnia mea mecum porto. Turkish motto: Yol bilen kervana katilmaz. (He who knows the road does not join the caravan.) All material copyrighted.

Tuesday, November 27, 2007

Deontic Ontological Proofs and Disproofs of the Existence of God

Anselm of Canterbury (1033 - 1109) had a profound insight: he realized that God, understood as "that than which no greater can be conceived," must exist of metaphysical necessity if he exists at all. God, by definition, is an ens perfectissimum, a maximally perfect being. Now a maximally perfect being cannot be modally contingent, but must be modally noncontingent: it must be either impossible (existent in no possible world) or necessary (existent in every possible world). But it is possible that there be a maximally perfect being. (There is at least one possible world in which God exists.) Therefore, God exists in every possible world, whence it follows that he exists in the actual world.

Posted by William F. Vallicella on Tuesday November 27, 2007 at 7:46pm. 12 Comments 0 Trackbacks

Saturday, May 5, 2007

Nota Notae est Nota Rei Ipsius and the Ontological Argument

"The mark of a mark is a mark of the thing itself." I found this piece of scholasticism in C. S. Peirce. (Justus Buchler, ed. Philosophical Writings of Peirce, p. 133) It is an example of what Peirce calls a 'leading principle.'

Let's say you have an enthymeme:

Enoch was a man
-----
Enoch died.

Posted by William F. Vallicella on Saturday May 5, 2007 at 3:59pm. 12 Comments 0 Trackbacks

Monday, May 15, 2006

Iris Murdoch on the Ontological Argument

From The Sea, the Sea (Penguin, 1978), p. 445:

The worshipper endows the worshipped object with power, real power not imaginary power, that is the sense of the ontological proof, one of the most ambiguous ideas clever men ever thought of.

Posted by William F. Vallicella on Monday May 15, 2006 at 5:12pm. 0 Comments 0 Trackbacks

Friday, May 27, 2005

Four Kinds of Ontological Argument

The essence of ontological argumentation is the inferential move from the concept/essence of F to the existence/nonexistence of F. We are all familiar with ontological arguments for the existence of God. They have been a staple of philosophy of religion discussions from Anselm to Plantinga. But there is nothing in the nature of ontological argumentation to require that God be the subject matter, or that the argument conclude to the existence of something. There are nontheistic ontological arguments as well as ontological disproofs. Thus there are four possible combinations.

Posted by William F. Vallicella on Friday May 27, 2005 at 4:54pm. 7 Comments 0 Trackbacks