Only the Wikipedia source referred to 'weak atheism' and 'strong atheism'. The other one did not mention these terms at all.
Sorry, there is a link at the bottom of the page to an article on "strong vs. weak atheism" by the same author on that site. Here is a direct link to it. You can do a search on "strong atheism" or "weak atheism" and find plenty of references. All of the definitions I posted are in common use, and were taken from multiple sources. They were not my own.
Perhaps I should have said that the definitions I posted are "commonly used" rather than "generally accepted" since, as I pointed out, they are used differently.
Try the Stanford Encyclopedia of Philosophy which pours cold water on the idea that atheism might just have one meaning:
I never said that "atheism" had one meaning. In fact, I said quite the opposite, that they are often used in more than one way. I also noted two distinct uses of the word "atheism" termed "weak atheism" and "strong atheism."
None of this means anything unless you first define what you mean by God or god.
The word "strong atheism" does in fact have a meaning without defining a specific god. When you're not referring to a specific god, the term "strong atheism" indicates the belief that no gods exist. I'll grant you that many strong atheists do qualify their belief as pertaining only to gods defined using terms like "omnibenevolent," "omniscient," or "omnipresent." However, it is not necessary to define a particular definition of god in order to claim that you are a strong atheist.
How hard did you look?
I looked in three different dictionaries:
American Heritage: Belief in the existence of a god or gods, especially belief in a personal God as creator and ruler of the world.
Princeton University WordNet: the doctrine or belief in the existence of a God or gods.
Meriam Webster: belief in the existence of a god or gods; specifically : belief in the existence of one God viewed as the creative source of man and the world who transcends yet is immanent in the world
Please post a reference which has a different definition for "theism."
I never said it was.
You originally said "An Agnostic believes that certain metaphysical truths are unknowable (as opposed to unknown)." I said that in reference to God, agnosticism generally means the belief that the existance of God is unknown rather than unknowable (although some agnostics might also believe that the existance of God is unknowable). You summarized Huxley's position quite nicely when you said "So I suppose Huxley's definition of an agnostic is someone who is prepared to say 'I don't know' when they don't know." This meshes quite well with the definition I posted, a commonly used definition of agnosticism.
-Bri