Disproving Odin - An Experiment in arguing with a theist with Theist logic

[SteveII]

This is the KCA

P implies Q 
P 
therefore Q

1. Everything that begins to exist (P) has a cause. (Q)
2. The universe began to exist. (P)
3. Therefore, the universe has a cause. (Q)

Nope. Definitely not Affirming the Consequent. 

Nope.

This is the KCA

P implies Q
R
therefore Q

You are assuming that 2, the universe, began to exist for the sake of your argument.

As Mister Agenda said, you are asserting without backing it up with evidence.

Fact is that YOU DON'T KNOW THAT THE UNIVERSE BEGAN TO EXIST.

So what you are actually doing is:

1. Everything that begins to exist (P) has a cause. (Q)
2. The universe began to exist. ( R )
3. Therefore, the universe has a cause. (Q)

An perhaps if someone who is better equipped at discussing logic and philosophy brings that up, I might address it.