Atheism is unreasonable

[FatAndFaithless]

Absolutely this.

The reason I'm asking is that according to scientific "fact" matter had to always exist and will always exist. It's really hard to fathom something that always was and always will be. Since matter always existed, it couldn't have come from nothing (the total absence of anything), but obviously some of you hold that one or the other of these assumptions is true.

No, see this is exactly why I said we have to be careful with the definitions of the words we use, because they have different meanings in different spheres. Much like the scientific definition of 'theory' versus the colloquial one, the word 'nothing' suffers a similar divergence.

No, science does not claim the universe as we know it came into existence from nonexistence. I also don't know where you're getting this 'matter has always existed' thing either, as our understanding of time only extends as far back as the Planck time after the initiation of the Big Bang.