This is why I don't like debating religion

[GameOver22]

Rath said:

Then I suggest you look up academic works and find what definition they use. You will find it is the same as the definition in the Oxford dictionary. As I said, I'm not going to debate on this issue as there aren't any shades of grey - you've simply got the wrong definition of the word.

Actually, it isn't. Granted, I'm not an expert. I've read two books. Atheism and Theism and The God Dialogues, and both define agnosticism as a lack of belief and atheism as the belief that God does not exist. You can also just peruse The Standford Encyclopedia of Philosophy, and you'll find the same thing.

Edit: For example:"Atheism I take to be the denial of theism and of deism. It also of course includes the denial of the existence of the ancient Roman and Greek gods and the like."

http://www.blackwellpublishing.com/content/BPL_Images/Content_store/Sample_chapter/9780631232582/Smart_001.pdf

Within the academic literature, its actually a pretty standard definiton from what I've read. Actually, looking at the definitions you provided, I think the academic literature just uses agnosticism in terms of the second definition you provided.....a non-committal attitude.....just utilize it as a noun instead of a verb.