I will prove to you that God exists

[Sheldon]

Perhaps I must share some culpability, for asking 7 questions, lets try one at a time, see if that helps simplify things for him. 

@Drew_2013

What is your criteria for disbelief? What I mean is, why do you disbelieve something, rather than believe it?

I can't make a blanket answer except on a case by case basis. 

Thank you, so you don't treat all claims to the same standard then, clearly. Now I can tell you what my standard is, and it I apply it to all claims. As I know that bias for or against any idea, is the definition of a closed mind. Look up the definition of open minded if you don't believe me. 

A disbelief is no different than a belief...its an opinion. 

So my disbelief that the world is flat, is no different to the belief of others that it is, they're both just opinions? I think you know that is not true. One could also look up the definitions of those words, and see that your claim is simply wrong. 

The available evidence is (my opinion) is too weak to justify the belief

Well it's not just opinion is it, you know of no objective evidence that supports the notion. That, is precisely what my atheism is. If it was just an opinion, then you could justify believing it just as easily.