I'm sure most of you have already heard this numerous times, but I seek opinions.
1. Everything which has a beginning has a cause.
2. The universe has a beginning.
3. The universe has a cause.
Its a very simple argument. But is it valid?
I think there would be few who question #1. So that leaves a few questions: did the universe have a beginning, and what constitutes a cause? Can something cause itself, or must a cause be external?
Two those who would argue against number 2, I would like to know how the universe being infinitely old is possible if the laws of thermodynamics are valid.