I hate that I know this, but "agender woman" is a subset of "nonbinary". Tumblr gender logic says there's men [cis men, trans men, sometimes nonbinary men or demiboys etc.], women [cis women, trans women, sometimes nonbinary women or demigirls etc.], and nonbinary people [agender, genderqueer, genderfluid, bigender, ""two spirit"", etc.]. People who have some kind of "nonbinary" identity often flip-flop around within the various different nonbinary subcategories; it's not necessarily cope (though imho the whole trans thing is one big cope in and of itself), it's just the inherent vagueness and lack of definition of what any of this shit means, and the fact that the more "fluid" you are, the cooler you are. It's perfectly possible, within Gender Logic, to id as a trans woman/"transfeminine", nonbinary, and agender, without any conflict between those terms whatsoever.