Look I thought about that question too. It is problematic. Actually, it's a redundant question. Atheists don't have to indicate how certain we are that there is no God. It's up to theists to prove that there is one. What I am 100% certain of is that there is no evidence to prove a God. In the same way I don't have to say that I am 100% certain that there are no fairies; I can say that I am 100% certain that no evidence exists to prove their existence. Got some proof of fairies? Show me. Same thing for God.

Over and over and over and over......Ok, I'm gonna give it a go. God DOES exist, and so does Superman, and Santa Claus! They ALL exist as human constructs endowed with human traits.Yes, ALL GODS ARE REAL AND EXIST AS HUMAN CONSTRUCTS JUST LIKE SUPERMAN AND SANTA CLAUS, and fairies, elves, witches, leprechauns and that most illusive, never obtainable good cup of coffee at Starbucks.

I had it at 99.99 in a good scientific manner... On the other hand, every little thing, the defence for it is being knocked down as fast as an undetermined persons new years resolution. But rather than waste my energy on doubt I just go with exploring the other options which are more interesting. Right? I'm not a scientist but that is the biggest if you sleep my daughter you better marry her or she'll die of shaming... and stones. That's not a pleasant individual with countless crimes to be tried for.

I am certain the Abrahamic god does not exist. I am not certain there are no gods. I see no evidence of them, so I conclude that they are unlikely. I see evidence against the Abrahamic faiths, so I conclude such a god must not exist.

I am not certain about anything. I feel it unfair and inappropriate to make any claims regarding the existence or non-existence of the supernatural--other than that I personally have seen no evidence of such. I am, after all, limited and ignorant in the scope of the universe. I don't think any gods exist, but I don't spend a lot of time ruminating on that theme, either. My primary orientation concerns what I feel is practical: "we're" (world at large, not us heathens on this site) never going to agree on what our imaginary friends say we have to do, who our imaginary friends are, etc. ... so can "we" please stop wasting time arguing about stuff we can't prove anyway and focus on the important stuff like feeding the hungry and healing the sick and caring for the poor (which, incidentally, most of "our" imaginary friends purportedly want us to do anyway!)? I think theology is a fine pastime--but it should never get in the way of mitigating suffering, let alone cause it! I suppose I'm inverting Pascal's wager, after a fashion: whether gods exist or not doesn't concern me, because I know I'm "godly" in my heart. Whatever. I don't claim to know much, but I'm pretty sure people can be induced to agree on what is empirically measurable--and not much else. It doesn't matter to me what we can't prove, as long as we're not letting that derail us from problem-solving in the realm of what we can prove. "Atheist" and "agnostic" are useful terms, but I don't live and die by them.

There is or there isn't so there isnt

Without a clear idea of what is meant by "God," I cannot adequately address the question. If we're talking about some specific gods, like Yahweh, I reject the concept 100%. The more I know about the history of a religion and the development of its gods or God, the more unlikely I consider the proposition. In the case of Yahweh, the polytheistic origin from earlier cultures from which the Hebrews borrowed their concept of God, to see the change from polytheism to monotheism, to track the changes biblically, leave no doubt in my mind that Yahweh doesn't exist. Other concepts of God would need to be reviewed individually.

I don't think it's possible to know anything to 100% certainty. You can know beyond a reasonable doubt, though.

If any being can violate laws of existence on a whim, there are no laws of existence, therefore the existence of a god would remove all meaning and reason from reality.

If someone could hurl lightning bolts at a whim and summon storms, that wouldn’t mean we were wrong about our understanding of weather. That would mean weather could never be understood because it wasn’t governed by laws. To this day, we cannot predict earthquakes and they seem to happen at whim. If there is room for god, it is in earthquakes, but if I told you “earthquakes therefore god” you’d probably write me off.

That is the thinking I extend to every facet. It is not a belief, but a conclusion from a logical postulate- “a thing suggested or assumed as true as the basis for reasoning, discussion, or belief.” Many people say that it takes faith or belief to say with 100% that there is no god, but that’s not true at all. I postulate that “if a consciousness can violate laws at will, they are not laws”. From that I conclude there is no god. Can you attack my postulate? If an entity can violate the laws of gravity at will, can there be laws of gravity?

Well, first I want to know how advanced something has to be to be a "god", but I'm 100% sure there is no such thing as magic, besides it would probably stop being magic if it was discovered. I say magical gods with no explanation for existing doesn't exist, but I'm open to the idea of life forms much more advanced where they could outclass even some lesser gods, maybe, but with all things it needs evidence.

I am a 100 percenter -- and proudly so!

You know I have experience what some would call God. But it was more of a field, a blanket of love. But I couldn't imagine that field to be a guy. And the more you read into the Bible, an when you study the trickster phenomenon, you start to see a connection.

I think a belief in god is faith, and i have absolutely no faith that there is an actual god.

There is also the issue of what a "god" actually is can be ambiguous. I can say with 100% certainty that I do not believe in the christian/islamic/jewish etc. god but when people say that god is nature or god is the great beyond or god is something really complex that we haven't even discovered yet, well then it gets a bit more complicated. However, I think that calling these big picture things "god" is really just a way for skeptical yet spiritual people to let go of tradition religion without taking that final scary step of admitting that there is no higher power.

The odds in Vegas that there is no God is 4:1

Yes.

There have been thousands upon thousands of gods in the past. None of them were real. More than 3,000 gods are worshipped today and the same number of them are real as there were in the past.

I don’t care. It’s irrelevant.

To me, the existence of the common definition of a god as an all-knowing omnipresent benevolent Being having ‘created us’ in ‘his image’ is beyond the shadow of a doubt 100% false. Speculation beyond that is fine, but had better stop short of describing anything as fact until those facts are in.

I'm 100% sure that the god I was raised to believe in doesn't exist. There are so many definitions of god that there may exist, some god that I haven't heard about, but I'm pretty sure at this point that I have no interest in it, if it does exist.

I can't say 100% but I'm pretty god damn confident. I would like to know where the universe and/or multiverse came from.

I raised my 75% rating to 90% leaving "wiggle room" if somehow something happens when tRUMP has his hand on the switch which when presssed will hasten the end of the world as we know it.

Define God. If your definition of God is self contradictory, I am certain that that concept of God doesn't exist.

100% certain there is no God. Not 100% certain some higher intellect might have Once existed that created life that evolved to this state .A creator could create and cease to exist. I tend to believe that matter always existed only in different forms. If humans exist then why not the possibility of mortal creator . Each one can not be explained

I am at the 99.99999... and concur with Mark Twain: "If there is a God, he is a malign thug."