Thursday, December 01, 2011
The Difference Between SpongeBob and a Maximally Great Being (More on the Modal Ontological Argument)
Here's some more clarification or furtrher obfuscation for my MCCC Philosophy of Religion students.
On Plantinga's modal version of the ontological argument.
It's possible that there is a world in which SpongeBob exists. This modal statement, as true, is necessarily true. Which means: It is impossible that SpongeBob not exist in that world.
Now consider this: It is possible that there is a world in which a maximally great Being exists. Modally, this statement is necessarily true. Which means: It is impossible that a maximally great Being does not exist in that possible world.
But "maximal greatness" means: a maximally excellent being that exists in every possible world. Now we have this:
It is impossible that a maximally excellent Being that exists (by definition of "maximal greatness") in one possible world does not exist in every possible world.
Our world is a possible world.
Therefore God exists.