You missed one possible position: that which holds that “I should not believe that God, or gods, exist”. Let’s call this number “4”. It differs from number “2” by addressing only the proper way to believe when confronted with the theistic proposition, while not making any absolute judgments. I will address each of your points below.I suspect that's because the word 'atheist' means a variety of things.
1. The one that most of them seem to favor is 'One who lacks belief in God or gods. They like this one because they believe (falsely in my opinion) that it frees them of any need to defend their atheism.
2. One who believes that the proposition 'God/gods exist' is False. Many of them are reluctant to admit this one, but they typically wear it on their sleeves. It's the definition of 'atheist' that I think best fits in most cases.
3. An anti-religious individual (which typically means anti-Christian in most cases in the US and Europe).
My guess is that holding to 3. (anti-Christianity) would motivate the kind of views that you criticise in the opening post.
(1) A defense? Easy. I am an atheist for the same reason that I do not believe in unicorns or centaurs: because I have never seen a god.
(2) This is the antitheistic position, an affirmative denial that any god exists. It appears wrongheaded because the affirmation of non-existence itself demands objective, supernatural evidence which is not available.
(3) I hold that religion is very important for its ability to render significance to the passages of human life. Religion need not be theistic, nor must it depend upon acceptance of the supernatural. I am not at all anti-religious, nor do I shun Christians, but I do oppose the central tenets of Christianity for their tendency to delude, and for the danger to the individual which seems to progress from that delusion.
(4) No reluctance here, for this is my position. As to why, there is an exceedingly simple logical argument, the premise of which is that a supernatural claim should only be accepted as true if shown so by the offering of objective, supernatural evidence.
Argument:
I should only believe that a god exists if I have some form of objective evidence that it does.
I have no objective evidence supporting the existence of any god.
Therefore, I should not believe that any god exists.
Note that the position remains moot on the actual existence or non-existence of a god, which point remains immaterial until such a time as a god deigns to reveal itself or clearly supernatural events begin to occur. It only clarifies the correct position to take when confronted with the proposition that a god exists. This is not a “cop out”, it is a clarification of correct belief given a complete lack of objective evidence either way.
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