Should Atheism proper include scepticism?

[TruthWorthy]

Cool.
I'll try to keep the posts in a manageable length to idea ratio.
Lets start by narrowing down the concept of "god".
Completely discluding religious based god, religion of any kind and stick to the one main argument, that of the existance of an intelligent force called "god".

Next is the false belief that humans have some sort of central importance.

I want to elliminate additional problems by containing the argument, that's all.

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By definition, any possibility should have an element of doubt attached. Just because somethings are possible doesn't mean they are all true, hence skepticism is needed.

Possibilty varies so widely.
Possibilities are invented to explain the cause of something else when that cause is unknown.
Theorists use possibilties when attempting to form hypothesis and those hypothesis are tested out in different contexts. If the hypothesis withstands the testing process it becomes a working hypothesis.
This is where the element of doubt comes into play.
Because the theory has been invented it can also be falsified by an improved theory, or better way of seeing the original problem, if you like.