How can you be sure that God doesn't exist?

[Simon Moon]

Hi,
 
 I am a new member here.

Welcome to the forum!
 

 Why do you believe that God doesn't exist?
 How can you be sure that God's existence is not real, for certain?

Atheism is not the claim, with absolute certainty, that a god or gods do not exist. Atheism is the disbelief that gods exist.

I am an atheists because theists have never met their burden of proof to support the claim that a god does exist, therefore, I do not see any warrant to believe.

My atheism is a result of the correct usage of skepticism when applied to the god claim. My atheism is not a dogmatic position, it is a provisional one. As long as theists continue to fail to provide demonstrable evidence and reasoned argument to support their god claim, I will continue to be unconvinced.

Humanity has still not uncovered a great deal about our own existence, or what's on the other side of the universe.

What's on the other side of the universe? All those other 1000's of gods you don't believe exist, of course.

If a god exists in a part of reality that we have not explored yet, then I am not justified to believe a god exists there. As soon as a god is discovered on the other side of the universe, I will then believe said god exists.
 
 

If anything, one can only be agnostic, rather than an atheist.

Agnosticism and atheism are not mutually exclusive positions. The majority of atheists are agnostic. me included.

Gnosticism / Agnosticism are positions on knowledge, or lack of knowledge.
Theism / atheism are positions on belief, or disbelief.

The logic I am going by is that atheism states that only hard evidence should be used to prove or disprove something; that is after all, the scientific way. Given that there is no evidence to prove or disprove God, you can only be agnostic rather than an atheist.

The scientific method does not deal in proofs, only evidence and models that best explain the evidence. Also, it is not up to science to disprove a claim for which there is not evidence.

I do not claim to know, with absolute certainty that gods do not exist. That makes me agnostic. I also do not believe gods exist, that makes me atheist.

Agnosticism is not some alternative position between atheism and theism. See the chart above.

I am an agnostic-atheist, as are a great many atheists.

For those who don't know what an agnostic is, agnostics are neutral towards the idea; they don't know if God exists or doesn't, and so are open to both possibilites, but conclude that at a human level, is impossible to know the truth.

That is not agnosticism. Agnosticism is the position that, it is unknown (and possibly unkowable) if a god exists.

I AM open to the possibility that a god exists. All I require is demonstrable evidence and reasoned argument to support the claim. Got any?
 

 So anyway, I would like to know why you believe that God doesn't exist?

I disbelieve gods exist because there is insufficient evidence, and lack of valid and sound logic, to support the claim. I do not claim to know, with absolute certainty, that gods do not exist.

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Let me add an important point.

The default position when it comes to existential claims, is to disbelieve said claim, until it is supported by evidence. It is not to believe the claim until it is proven wrong.

Warning! 18th century philosopher Hume uses the pronoun 'man' in the following quote. Yes, he lived in a sexist time. Get over it.

Does not change the fact that his quote is correct otherwise.

As philosopher David Hume said, "A wise man proportions his beliefs to the evidence, and should always reject the greater miracle".