The Kalam Cosmological Argument goes:
1. Whatever begins to exist, must have a cause of its existence.
2. The Universe began to exist.
Therefore, the Universe has a cause of its existence.
A lot of debate on the KCA has concerned whether 1 can be applied to the universe itself. But 2 seems strongly supported by Big Bang theory. But do developments in string theory suggest that premise 2 is vulnerable? String Theorist Veneziano seems to think so. What do you think?