The most common arguments given for the existence of god:
Modal arguments (using the modalities of possibility and necessity):
(1) If God possibly exists, then God necessarily exists
(2) God possibly exists
(3) Therefore, God necessarily exists.
Cosmological argument:
(1) Whatever exists, and is contingent, has been caused to exist by something other than and not part of itself.
(2) The world exists and is contingent
(3) Therefore, something not of the world has caused the world to exist.
Teleological argument (argument from design):
(1) The world as a whole is well-ordered
(2) Good order obtains only by the design of something intelligent
(3) Therefore, there is an intelligent designer of the world as a whole.
Moral argument:
(1) Moral laws tell us how, in general, we really should behave, not merely how we or others want to regulate our behavior
(2) Such laws can only be thought of as promulgated by a supreme and benevolent legislator
(3) Therefore, there is a supreme and benevolent legislator.
Abridged from a blog by Michael Liccione, PhD (philosophy).
http://provetomethatgodexists.blogsp...s-and-ill.html