If I was to tell you that everything in all creation is a fact and that in my opinion those facts represent the truth of reality, would I be telling the truth?
If I was to then tell you a blatant lie and ask you if it was true, would my lie be true?
You see, you cannot answer yes to my first question and no to the second.
If naturalism is the ultimate truth of all reality then the law of cause and effect can take us all the way back to the big bang as well as determine the future. Nothing in all of existence can act in a way that is not determined by the natural laws.
Having said that, any effect that occurs within this system is a fact. I would assert that these facts are true. I would also assert that if naturalism is truth these facts cannot be false. Ever. Nothing can react in a way that is outside of the natural laws. In other words, nothing can be false.
But then there's us. If we are purely a part of the naturalistic system, then nothing we do can be false. Our brains must be purely swirls of chemicals reacting — true as the day is long. But then there's this odd experience resulting from these reactions that we call 'us'. This experience then has the audacity to begin calling things right and wrong. We seem to be capable of making all sorts of mistakes. We set our mind to something and screw it up royally. We aim for the nail and hit our thumb. We lie to people and begin reactions in their minds that are not based on truth. We believe all religions can be true, but in fact they are not. We say "don't worry he looks like a nice puppy." and go home missing a pant leg.
How is this possible? Does matter as it "mysteriously" becomes more complex start unraveling? How does it come to create experiences that we call us – which must be true – yet we experience ourselves making "mistakes".
Talk about science fiction!
I don't care what side of the theist/atheist debate you are on. Reality is MUCH more bizarre than we give it credit for.