Agnosticism

"Agnosticism" is the belief that one either cannot know, or cannot decide, whether God exists. The term was coined by Thomas Henry Huxley in 1869, though the concept has been kicking around for much longer. Agnostics usually appear under the category of "non-believers" along with atheists. Incidentally, whilst there is a degree of overlap, agnosticism is not the same as Atheism. Agnosticism is distinct in the sense that whilst agnostics do not necessarily believe in God, they do not disbelieve in God either. While agnostics generally agree with atheists on the subject of belief in God or gods, they disagree on the subject of disbelief: a common agnostic criticism of atheism is the scientific principle that "absence of proof does not consitute a disproof".

There are many different strands of agnostic thought, including the following :
 * belief that God is inherently "unknowable". Adherents to this type of agnosticism believe that one cannot know of God's existence, role, appearance or ethics (assuming that he might exist at all).
 * belief that God's existence is neither proven nor disproven. That is, that while God may be "knowable", we do not "know" yet either way.
 * agnostic atheism, where God probably does not exist, it is not impossible that one does.
 * agnostic theism, where Go probably exists, but that it is not certain.

Agnosticism can also be used to describe someone who is undecided, or just non-committed to any particular belief. For example, in experimental physics, there is a concept called "model agnosticism", which describes a state of mind in which the experimenter has multiple theories (or "models"), but keeps an open mind about which of them is true pending the results of the experiment.

Agnostics have on occasion been condemned by followers of various religions for their lack of belief (often being lumped in with atheists in the process). They have also been criticized by prominent atheist Richard Dawkins for "fence sitting" -- i.e. not having the conviction to outright admit to being an atheist. Many agnostics find this insulting, and parallels have been drawn between agnosticism and bisexuality (bisexuals also facing discrimination from both ends of a spectrum).