Atheism comes from the word atheos which means without god. Strong atheism is the belief that there are no gods.
No that's just Atheism. I'm curious to find out where you've gained this definition from.
Jesse provided the doctrine earlier in the thread. That is what it is, no more no less.
Agnosticism is the belief that you can't prove or know a god exists, which says nothing about whether or not you believe one exists or not. That's why you can be both.
Agnosticism is the lack of belief in every other alternative faith, not that you can't prove or know God exists. All religion is based on faith, which by definition would suggest you can't prove it.
If agnosticism is the middle ground, then what is gnosticism to you then? These two words cover a different claim and aren't suitable to describe your belief on deity claims.
I would say Atheism is a contradiction in the mind. First of all you would have to believe there are no Gods to be an Atheist.
But to believe is to act in accordance with a lack of knowledge, which could only lead to a maybe and therefore into Agnosticism.
Of course, you would describe that person to be an Agnostic-Atheist. But that's not the case, to be one you must renounce the other.
About lacking belief, yes you would need reference to make a conscious decision, but you don't need to be conscious of it to be lacking. I think of it like owning an object. I don't need to know about X (an arbitrary item) to not own it do I? I can also know about it and consciously not own one etc.
But all belief is based on reference. If you hear a story, you choose whether or not to believe it, if you see a monster, you choose whether or not to believe it, if you smell burning, you choose whether or not to believe it. Belief is in the mind, your senses and thought processes provide you with the reference.
If you are not concious of a given reference, there is no way you could form a belief based upon it. So while your analogy is an accurate one when refering to ownership, it's not quite in line with belief.
When I say prove, I mean it in practical, scientific terms. Sure, we could wake up in an alternate reality but do we have good reason to think that? Or any evidence to suggest that? What's more important to think about is what is probable rather than what is possible. It's possible that gravity and evolution aren't real but it's very probable that they are or at least there is some illusion of them.
Fair enough, but surely to believe a medium which only operates within the laws of the natural world can explain what happens beyond it is illogical.