1250 word philosophy paper

Suppose someone tries to show that we should believe God exists like this: Any proposition is either true or false. Thus, there is a 50% chance that any proposition is true. Since "God exists" is a proposition, there is at least a 50% chance that God exists. If there's a 50% chance that God exists, it makes sense to believe that he does. Thus, we should believe that God exists.

Put this argument in your paper. Then, explain whether it lives up to the standards of philosophy. If you say it does, explain why. If you say it does not, explain why. Use 4 to 5 sources to help support your position.