By Ryan Hemelaar
The Kalam Cosmological Argument is a very strong argument for God's existence. However, the leader of the Brisbane Atheists thinks that he has found a way to refute it. To summarise his argument:
1. There is an equal amount of matter and anti-matter in the universe.
2. Negative one plus one equals zero.
3. Therefore, the sum of the total matter of the universe is equal to zero.
4. Therefore the universe does not exist.
5. Therefore the universe never had a beginning.
6. Therefore there was no cause to the universe
As you can probably already see, there are many problems with this argument.
Firstly, there is no evidence to think that there is an equal amount of matter and anti-matter in the universe. Some Big Bang theorists speculate that there should have been equal amounts of matter and anti-matter made at the Big Bang. However, no anti-matter domains have been detected in space within 20 megaparsecs (6.17*10^20 km) of the Earth.
Even one of the leading advocates in the search for antimatter in space, Samuel Ting, laments:
"At the beginning, equal amounts of matter and antimatter were created [in the “big bang”]. Now there seems to be only matter. There have been theoretical speculations about the disappearance of antimatter, but no experimental support." 
Secondly, it is a total misunderstanding to think that even if there was an equal amount of matter and anti-matter in the universe that therefore nothing exists. That is as illogical as saying that if I have a certain amount of debts and a certain amount of money, therefore I have zero money. Even if on balance it does equal out as nothing, the debts still exist and the money still exists, they're not nothing. Similarily, even if the matter and anti-matter were on balance, equal, the anti-matter still exists and the matter still exists!
Thirdly, his conclusion that the universe does not exist I think is absurd. As Descartes said, I at least exist. Even when I doubt that I exist, who is there to do the doubting? I doubt, therefore I am. There simply must be something that exists.
So in conclusion, this Atheist's attempt at refuting the Kalam Cosmological Argument falls down at numerous points. Therefore, if one cannot refute the Kalam argument, a rational person is still obligated to believe that God exists.
 Antia, M., Ready to takeoff, antimatter experiment takes some flak, Science, 280:1339, 1998.