The problem with the term ‘agnostic’ as it is commonly used is that, quite frankly, it’s a nonsense word. Many people, including quite a number in the skeptical community, have become so enamored with the fallacy of excluding the middle that they forget that there are situations where you really do have a bivalent choice. Combine that with the demonisation of the word ‘atheist’ and the desire to appear open minded, and, BAM! — You’ve got the rise of ‘agnostic’.

And as much as you may dislike it, “agnostic” and “gnostic” are nouns also. In fact, most dictionaries list the noun definition first. Before writing a post complaining about the incorrect use of words, you really should have consulted a dictionary!