Ah, sorry, I fudged the postbox argument. That's what happens when I'm taking the pills. I'll try to fit it specifically into the argument pattern you proposed.
"1) That which begins to exist must have a cause
2) God did not begin to exist
3) God does not require a cause"
The postbox fallacy should read as:
1) All postboxes are red things (or something along the lines of "That which is a postbox must be red", or similar universal claims)
2) The red balloon is not a postbox (negation of A pertaining to object C, e.g. God did not begin to exist)
3) Therefore, the red balloon is not red.
Both arguments follow the pattern I mentioned before:
1) All A's are B's
2) Object C is not an A
3) Therefore object C is not a B
Using exactly the same argument pattern with reasonable premises we are able to arrive at a ridiculous and contradictory conclusion. The content of the argument is irrelevant (so long as the conclusion is related to the premises); in fact, I think that both premises and the conclusion are all correct, demonstrating that the argument pattern itself, not the content, is incorrect.
Another example might be in order:
1) All chat forums are fun (or to fit into the God argument's phrasing, are required to be fun)
2) The play house is not a chat forum
3) Therefore, the play house is not fun (when it actually may be)
"1) That which begins to exist must have a cause
2) God did not begin to exist
3) God does not require a cause"
The postbox fallacy should read as:
1) All postboxes are red things (or something along the lines of "That which is a postbox must be red", or similar universal claims)
2) The red balloon is not a postbox (negation of A pertaining to object C, e.g. God did not begin to exist)
3) Therefore, the red balloon is not red.
Both arguments follow the pattern I mentioned before:
1) All A's are B's
2) Object C is not an A
3) Therefore object C is not a B
Using exactly the same argument pattern with reasonable premises we are able to arrive at a ridiculous and contradictory conclusion. The content of the argument is irrelevant (so long as the conclusion is related to the premises); in fact, I think that both premises and the conclusion are all correct, demonstrating that the argument pattern itself, not the content, is incorrect.
Another example might be in order:
1) All chat forums are fun (or to fit into the God argument's phrasing, are required to be fun)
2) The play house is not a chat forum
3) Therefore, the play house is not fun (when it actually may be)