To make an absolute statement in the negative is similar to saying that nowhere in the universe does there exist a flying spaghetti monster.
Give me a break. I am willing to make that absolute statement even though I don't have "unlimited knowledge of this universe."
First may we define our terms. The term "flying spaghetti monster" comes literally from a satirical open letter written by Bobby Henderson in 2005 and started a social movement that promotes a light-hearted view of religion and opposes the teaching of intelligent design and creationism in public schools. It is not any lifeform that seems to sort of look like spaghetti, but rather it is the silly "god" made of spaghetti that created the universe.
I am confident there is no god, but for most atheists, confidence that all the specifically defined gods do not exist is sufficient.
If you think it is self defeating to say there is absolutely no flying spaghetti monster, then you might expect it to show up one day. I am positive that it won't, and equally positive that "God" won't either. I would love to be eating my words and "he" shows me up for taking such a self defeating stand.
I am equally confident that no matter how many monkeys with typewriters you employ for any amount of time, even up to an infinite number of monkeys for an infinite amount of time, you will never have one of them type out Shakespeare's HAMLET.
We know for sure that technically, the probability of that happening is not totally ZERO, but we all know it would never happen.