Explanation why people become become atheists are varied and may even be of use for understanding atheists, however are not relevant for learning the meaning of atheism. To learn atheism, we have to simply bear in mind an atheist is somebody that responds with anything in addition to an unequivocal "yes" to your question of whether she or he believes that god(s) exist.
Still cloudy? Take into account that atheism arises from the Greek "a - theos," and since the "a" prefix means "without" or "the scarcity of," we must understand atheism close to theism. Theism refers to the thought some type of god or gods exist. A theist is certainly one who accepts the theistic belief claim (i.e., getting some sort of god or gods exist). An atheist is certainly one who will not accept the theistic claim. That may be, atheism means "without theism" and refers back to the absence or deficiency of theistic belief. Given that could what atheism is, it is time to examine how it's not. This will bring us to a single of the very common misconceptions about atheism.

What Atheism Is just not
Atheism doesn't involve absolute certainty that god(s) usually do not or cannot exist. Atheism doesn't need people to make sure that there are no gods, which is erroneous to view atheism as requiring disbelief in a active sense. An atheist is a person that will not assume that gods exist; they are not somebody who disbelieves in gods. The visible difference might appear subtle, but it is important.
Some atheists do indeed boast of being certainty that gods will not or cannot exist. These individuals are sometimes called "strong atheists." Nobody disputes the existence of such atheists. The point is that certainty isn't a necessary condition of atheism. Individual who asserts that there "probably" isn't god is an atheist. In reality, one needn't assert something to be an atheist. One only need not accept the theistic belief claim.
Why should we care? Let us eliminate the many obvious reasons why accuracy provides improvement over inaccuracy and why dictionaries usually are not necessarily above reproach. Defining atheism accurately reduces epistemological confusion and reminds us the location where the burden of proof rests: squarely on the shoulders on the theist. In fact, it does not take theist making the claim.
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