Of course I can prove a negative, but never with 100% certainty, but with reasonable certainty. For instance, if you say there is an elephant in your garage, and I look for the evidences and find none, it is very reasonable to say that there is no elephant, because of the total lack of evidence. 99% of the things you do not believe is because of the lack of evidence for it.
And modern science is not a religion, because it cannot adopt dogmas, but only proven (reasonable) truths.
So you trot out the old strawman fallacy... Elephant in the garage? Really?
Sigh...
All the best then, catch you later. :)