Do aliens exist?

[Tiberius]

I will accept the possibility of alien life, but you are quite correct; I will not support it until it is proven.

But will you accept the possibility of God?

Of course I accept the possibility of God. It is the reason I call myself an agnostic atheist or "weak" atheist. How could I possibly know something that by definition is outside the realm of knowledge? Atheism is a belief as much as theism, only it is a belief based on our observations, whilst theism is a belief based on faith alone.