Why are atheist...atheist?

[Ace Otana]

However, if that is your definition of explanatory power than, yes, God has no explanatory power.
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By explanatory power I mean something that is falsifiable. Something that can explain and with credibility and measure.
The pink invisible unicorn can explain just as much as your god, but they both have no explanatory power as they are without any value. I could say that the pink invisible unicorn created the universe and it would have just as much credibility and likely hood as your god. Seeing as both concepts lack value and explanatory power. They both lack evidence for their existence.

I never stated one should assume belief in God but to assert that he doesn't exist is ignorance. In its most basic form, my belief is that God probably exist.

My stance is that I admit to not knowing whether a god exists or not but ultimately reject the idea due to lack of evidence, that makes me an agnostic atheist. Simple rejection.

Take your example. Lets say you didn't check for change in your pocket and have no memory of whether there might be or not. Does it make sense to assert that there is no change in your pocket based on what you know?

It doesn't make sense to claim either way. If you don't know, then that is your answer - you don't know.
Also by evidence of absence - there is a total absence of evidence for the existence of god, there for it's evidence of his absence.

I don't. I say he probably exist because the contrary is not sufficiently acceptable to my beliefs.

You find the idea that the universe formed naturally hard to accept? What makes you think a god did it? Where did god come from and how did he create the universe from nothing? Which seems even harder to swallow.

Only rejection of beliefs about such a concept are rational.

Then why don't you?

Again in this circumstance, explanatory power, for me, was demonstrating how a unicorn differs from God in making beliefs about the object based on observations. By my original definition there is clear explanatory power.

What you think is knowledge or know-ability of unicorns and god does not make it any more special. They are just concepts. You need evidence to demonstrate that god is more than just an imaginary friend.

Again the only conjecture I make is that God probably exist and I leave it at that.

Not quite, you are assuming god exists and created the universe some how. Your explanation is far more complex than my explanation. My only assumption is that you're mistaken. I'm with Occam's Razer. Only accept more complex explanations when there is evidence for them.
The explanation requiring the fewest assumptions is most likely correct.

My reason for this thread was to learn why atheist, now known only to be strong atheist, irrationally assert that God doesn't exist without any evidence.

And I'll like to learn why theists assert that there is a god. Also with no shred of evidence to back up their assertions.