"Non-belief" does not require any evidence until "belief" provides evidence. When a person asks me to prove there is no god I automatically know the intelligence of the person I'm debating. I don't have to prove there is NOT a pink elephant in my living room until someone proves its existence first. Believers in god have an incredible burden, because they know they will never be able to prove their beliefs until their death.
I actually feel completely safe in my assumptions of the cosmos. If there was compelling evidence that a god revealed themselves to us than I would be forced to change my ideas. However, with believers in god we could navigate every inch of the universe and find nothing but planets, stars, gases, etc and they would still be convinvced that god exists; they may just change their definition of god. This is not logic, reason, intelligent or any other word that would describe a person who has individual thoughts. It just shows you how deep-rooted brainwashing can really be.