It seems that you still do not have a grasp of what agnosticism is, and your distaste for the concept is the big fat elephant standing in your way.
And I see you do not have a grasp on what knowledge is in epistemological terms. More on which further down.
Distaste is an emotional term and not one that I would use. Anyway, up till now Ive been describing agnosticism as merely irrelevant, but that piece I responded to was worse, it was presumptuous and plain wrong. All things are not uncertain and propositions concerning God can be true or false; and nor do we need a self-assumed authority with its own title presuming to inform of us of what is to count as valid.
Agnosticism is not saying that knowledge is limited to what we can experience. It is saying that knowledge is unobtainable (either at this particular moment, for that particular person, for this particular subject, or-- in contrast-- it is universally unobtainable.)
With respect I can see youre not getting it! The reason knowledge is unobtainable is because we have only one means by which we can learn about the world,and that is experience, and nothing in experience is certain. If agnosticism has something different to say on the matter then Ill be delighted to hear it.
You also act as if agnosticism is the default, like duh, of course that's what people believe. But I hardly find this to be a mainstream concept. People like to be sure, and it often never crosses their minds that they really don't have enough evidence to be sure. It is probably quite common among this sort of community, in which philosophical arguments are known and actively debated, but I assure you, we are a minority.
And, really, we have already went over this: Atheists can be just as irrational as the unicornists. There is nothing inherent in atheism that says "Thou must be rational and only make claims that you can back up."
Ive said elsewhere that anyone can call himself an atheist and I gave some examples, some of which very clearly left reason at the door. So there is no superior standpoint (although atheism has one small advantage in advancing an overall argument that hasnt to date been universally contradicted). Reason and logic are open to theists and atheists alike. But in the case of agnosticism does it really need a pretentious title to recognise and state that human knowledge is limited to what can be experienced? Most atheists come to that very same conclusion as a prime reason for disbelief in God; and what is more, they do so without having to be informed by a self-appointed authority.