Ok, if you call yourself an agnostic, I reserve the right to call you a wimp; a big girl’s blouse, if you will. It’s a pretty simple conundrum – if I ask you, “Do you believe in any gods?” and you answer, “I don’t know”, you are only “agnostic” in a pedantically semantic sense, in as far as we cannot ever “know” for certain about such things. However, please for one minute consider the term “atheist.” The term simply means, “someone who does not believe in gods”, meaning that all agnostics are inherently atheists as well. If you answer, “I don’t know”, you’re still saying that you don’t believe, because you don’t live your life as if some celestial dictator exists – you’re just reserving judgement until further notice, which is exactly what atheists do, only we do it better. There doesn’t need to be a difference between atheists and agnostics – we essentially believe exactly the same things, but while the former are open about it, the latter hide behind political correctness and (sometimes) sanctimony to avoid having to present an opinion either way. In short, get off your fence.
A propos, this whole concept of “knowing” that there is or is not a divine or supernatural element in our lives is wholly ridiculous – of course we cannot know for certain – we simply have to analyse what we see in the world and come up with the best conclusions we possibly can given the evidence available. It is for this reason that I have a real problem with theists claiming that they “know” a god exists, when they in fact mean that they are certain that a god exists. Knowledge implies verification and actual proof – facts are known because the way the world works can be observed and independently ratified, ending up with a conclusion that constitutes what we consider “knowledge”. Blind speculation and evidence from experience simply cannot count when it comes to such claims, so the notion that a theist can posit that they know that such a being exists is risible – please demonstrate your “knowledge” before you try to make us all see the fairy as well. I’ll let you use the word “certain”, but that’s the limit I’m afraid, chaps. I also see an equal problem with atheists stating that there is categorically no such thing as a god, since that claim would, paradoxically, require omniscience. We are all, therefore, regardless of what we think, agnostic in one way or another - it's on the same level as saying you're a homo sapiens, obviousness-wise.